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Pedro – As organizações podem executar a gestão do relacionamento com o cliente, pois se tornou viável, hoje em dia, a estratégia de lidar com cada um deles mediante avanços na customização em massa, nos computadores e na Internet.
Alice – Embora tenha como um de seus objetivos a construção de relacionamentos sólidos com os clientes, o marketing de relacionamento não constrói ligações econômicas e técnicas entre as partes interessadas no negócio.
Antônio – A prática do marketing um para um (one to one) não é para qualquer empresa, já que o investimento em coleta de informações em hardware e em software pode superar os benefícios da implantação desse processo.
É(São) correta(s) a(s) afirmação(ões) de
Localizada no nordeste do país, a rede Móbile cobra, em média, 5 centavos a mais do que a concorrência por litro de gasolina. Ela conduziu uma pesquisa para avaliar os diferentes benefícios esperados pelos clientes ao pararem o carro em um posto para abastecer. Esse levantamento identificouos seguintes segmentos de motoristas, conforme os benefícios esperados:
1.estrelas: produtos premium e serviço de qualidade (16%);
2.jovens: abastecimento rápido, serviço rápido e comida rápida (27%);
3.fiéis: produtos com marca e serviço confiável (16%);
4.caseiros: conforto (21%);
5.econômicos: preço baixo (20%).
A decisão estratégica mais acertada, de acordo com a pesquisa, é
Uma consultoria de marketing é contratada para elaborar um relatório de análise do mercado e do consumidor nos dias de hoje e, ao final do trabalho, destaca os seguintes fatores:
I – os entraves burocráticos e os problemas na tecnologia de comunicação dificultaram às empresas fazer negócios em outros países e, aos consumidores, comprar produtos estrangeiros.
II – muitos países regulamentaram alguns setores e taxaram determinadas atividades para aumentar a concorrência e as oportunidades de crescimento, oferecendo mais alternativas para os consumidores.
III – clientes esperam mais qualidade e serviços, têm cada vez menos tempo para gastar, querem mais conveniência, percebem menos diferenças reais entre os produtos e mostram menos fidelidade à marca.
O departamento de marketing da empresa contratante deve levar em consideração o(s) fator(es)
Fossil Fuels
The twentieth century has been called the hydrocarbon century due to the abundance of fossil fuels, and their contribution to human development. Fossil fuels were formed over millions of years by the decomposing remains of plants and animals under immense heat and pressure. This process resulted in energy laden fuels coal, petroleum, and natural gas, which together have generated most of the energy consumed globally for over a century, paving the way for continued advancement and new inventions.
Fossil fuels are currently the most economically available source of power for both personal and commercial uses. Petroleum fuels our cars and thirst for plastics, while natural gas and coal heat and electrify our homes. Mass transportation is also largely propelled by fossil fuels. In 2005, more than 3/4 of total world energy consumption was through the use of fossil fuels. Petroleum led with over 43.4 percent of the world’s total energy consumption, followed by natural gas (15.6 percent) and coal (8.3 percent). North America is the largest consumer of fossil fuels, utilizing nearly 25 percent of the world’s resources.
Long thought to be inexhaustible, fossil fuels have been used extensively since the Industrial Revolution. However, many believe that the world is using fossil fuels at an unsustainable rate. Some experts believe that the world has already reached its peak for oil extraction and production, and that it is only a matter of time before natural gas and coal follow suit. These near-term concerns about oil supply have led to increasing focus on, and exploration of, alternative sources of petroleum, such as in tar sands and oil shale.
To release their stored energy, fossil fuels must be burned. It is during this combustion process that a variety of emissions and particulates, including ash, are released into the atmosphere. Primary releases are sulfur, nitrogen, and carbon, which can be harmful to the environment. They can combine with water vapor in the air to form acidic compounds that create acid rain, and burning fossil fuels releases carbon dioxide, a greenhouse gas that scientists believe is key factor in global climate change.
There are also environmental risks associated with extracting, transporting, and utilizing fossil fuels. Mining for coal and drilling for oil are especially hazardous because the digging of massive mines and wells can change the surrounding landscapes and bring massive amounts of salt water to the surface which can damage nearby ecosystems without proper treatment and sequestration. Natural gas extraction is somewhat safer, but can also be hazardous. While there are regulations in place that attempts to minimize the risks, it is impossible to eliminate them completely. However, regulation is not sufficient; there must be continued research in developing new technologies for both fossil fuel and renewable energy, in addition to increasing conservation measures.
Environmental Literacy Council
http://www.enviroliteracy.org/subcategory.php/21.html, access on March 14th, 2010.not valid statement found
In terms of the organization of ideas in the text,
Fossil Fuels
The twentieth century has been called the hydrocarbon century due to the abundance of fossil fuels, and their contribution to human development. Fossil fuels were formed over millions of years by the decomposing remains of plants and animals under immense heat and pressure. This process resulted in energy laden fuels coal, petroleum, and natural gas, which together have generated most of the energy consumed globally for over a century, paving the way for continued advancement and new inventions.
Fossil fuels are currently the most economically available source of power for both personal and commercial uses. Petroleum fuels our cars and thirst for plastics, while natural gas and coal heat and electrify our homes. Mass transportation is also largely propelled by fossil fuels. In 2005, more than 3/4 of total world energy consumption was through the use of fossil fuels. Petroleum led with over 43.4 percent of the world’s total energy consumption, followed by natural gas (15.6 percent) and coal (8.3 percent). North America is the largest consumer of fossil fuels, utilizing nearly 25 percent of the world’s resources.
Long thought to be inexhaustible, fossil fuels have been used extensively since the Industrial Revolution. However, many believe that the world is using fossil fuels at an unsustainable rate. Some experts believe that the world has already reached its peak for oil extraction and production, and that it is only a matter of time before natural gas and coal follow suit. These near-term concerns about oil supply have led to increasing focus on, and exploration of, alternative sources of petroleum, such as in tar sands and oil shale.
To release their stored energy, fossil fuels must be burned. It is during this combustion process that a variety of emissions and particulates, including ash, are released into the atmosphere. Primary releases are sulfur, nitrogen, and carbon, which can be harmful to the environment. They can combine with water vapor in the air to form acidic compounds that create acid rain, and burning fossil fuels releases carbon dioxide, a greenhouse gas that scientists believe is key factor in global climate change.
There are also environmental risks associated with extracting, transporting, and utilizing fossil fuels. Mining for coal and drilling for oil are especially hazardous because the digging of massive mines and wells can change the surrounding landscapes and bring massive amounts of salt water to the surface which can damage nearby ecosystems without proper treatment and sequestration. Natural gas extraction is somewhat safer, but can also be hazardous. While there are regulations in place that attempts to minimize the risks, it is impossible to eliminate them completely. However, regulation is not sufficient; there must be continued research in developing new technologies for both fossil fuel and renewable energy, in addition to increasing conservation measures.
Environmental Literacy Council
http://www.enviroliteracy.org/subcategory.php/21.html, access on March 14th, 2010.not valid statement found
In “To release their stored energy, fossil fuels must be burned.” (lines 33-34) the expression in boldtype can be replaced by
Fossil Fuels
The twentieth century has been called the hydrocarbon century due to the abundance of fossil fuels, and their contribution to human development. Fossil fuels were formed over millions of years by the decomposing remains of plants and animals under immense heat and pressure. This process resulted in energy laden fuels coal, petroleum, and natural gas, which together have generated most of the energy consumed globally for over a century, paving the way for continued advancement and new inventions.
Fossil fuels are currently the most economically available source of power for both personal and commercial uses. Petroleum fuels our cars and thirst for plastics, while natural gas and coal heat and electrify our homes. Mass transportation is also largely propelled by fossil fuels. In 2005, more than 3/4 of total world energy consumption was through the use of fossil fuels. Petroleum led with over 43.4 percent of the world’s total energy consumption, followed by natural gas (15.6 percent) and coal (8.3 percent). North America is the largest consumer of fossil fuels, utilizing nearly 25 percent of the world’s resources.
Long thought to be inexhaustible, fossil fuels have been used extensively since the Industrial Revolution. However, many believe that the world is using fossil fuels at an unsustainable rate. Some experts believe that the world has already reached its peak for oil extraction and production, and that it is only a matter of time before natural gas and coal follow suit. These near-term concerns about oil supply have led to increasing focus on, and exploration of, alternative sources of petroleum, such as in tar sands and oil shale.
To release their stored energy, fossil fuels must be burned. It is during this combustion process that a variety of emissions and particulates, including ash, are released into the atmosphere. Primary releases are sulfur, nitrogen, and carbon, which can be harmful to the environment. They can combine with water vapor in the air to form acidic compounds that create acid rain, and burning fossil fuels releases carbon dioxide, a greenhouse gas that scientists believe is key factor in global climate change.
There are also environmental risks associated with extracting, transporting, and utilizing fossil fuels. Mining for coal and drilling for oil are especially hazardous because the digging of massive mines and wells can change the surrounding landscapes and bring massive amounts of salt water to the surface which can damage nearby ecosystems without proper treatment and sequestration. Natural gas extraction is somewhat safer, but can also be hazardous. While there are regulations in place that attempts to minimize the risks, it is impossible to eliminate them completely. However, regulation is not sufficient; there must be continued research in developing new technologies for both fossil fuel and renewable energy, in addition to increasing conservation measures.
Environmental Literacy Council
http://www.enviroliteracy.org/subcategory.php/21.html, access on March 14th, 2010.not valid statement found
Among the solutions to minimize the risks associated with the use of fossil fuels, the author suggests the
Fossil Fuels
The twentieth century has been called the hydrocarbon century due to the abundance of fossil fuels, and their contribution to human development. Fossil fuels were formed over millions of years by the decomposing remains of plants and animals under immense heat and pressure. This process resulted in energy laden fuels coal, petroleum, and natural gas, which together have generated most of the energy consumed globally for over a century, paving the way for continued advancement and new inventions.
Fossil fuels are currently the most economically available source of power for both personal and commercial uses. Petroleum fuels our cars and thirst for plastics, while natural gas and coal heat and electrify our homes. Mass transportation is also largely propelled by fossil fuels. In 2005, more than 3/4 of total world energy consumption was through the use of fossil fuels. Petroleum led with over 43.4 percent of the world’s total energy consumption, followed by natural gas (15.6 percent) and coal (8.3 percent). North America is the largest consumer of fossil fuels, utilizing nearly 25 percent of the world’s resources.
Long thought to be inexhaustible, fossil fuels have been used extensively since the Industrial Revolution. However, many believe that the world is using fossil fuels at an unsustainable rate. Some experts believe that the world has already reached its peak for oil extraction and production, and that it is only a matter of time before natural gas and coal follow suit. These near-term concerns about oil supply have led to increasing focus on, and exploration of, alternative sources of petroleum, such as in tar sands and oil shale.
To release their stored energy, fossil fuels must be burned. It is during this combustion process that a variety of emissions and particulates, including ash, are released into the atmosphere. Primary releases are sulfur, nitrogen, and carbon, which can be harmful to the environment. They can combine with water vapor in the air to form acidic compounds that create acid rain, and burning fossil fuels releases carbon dioxide, a greenhouse gas that scientists believe is key factor in global climate change.
There are also environmental risks associated with extracting, transporting, and utilizing fossil fuels. Mining for coal and drilling for oil are especially hazardous because the digging of massive mines and wells can change the surrounding landscapes and bring massive amounts of salt water to the surface which can damage nearby ecosystems without proper treatment and sequestration. Natural gas extraction is somewhat safer, but can also be hazardous. While there are regulations in place that attempts to minimize the risks, it is impossible to eliminate them completely. However, regulation is not sufficient; there must be continued research in developing new technologies for both fossil fuel and renewable energy, in addition to increasing conservation measures.
Environmental Literacy Council
http://www.enviroliteracy.org/subcategory.php/21.html, access on March 14th, 2010.not valid statement found
Based on the meanings in the text, the option in which the two words are synonymous is
Fossil Fuels
The twentieth century has been called the hydrocarbon century due to the abundance of fossil fuels, and their contribution to human development. Fossil fuels were formed over millions of years by the decomposing remains of plants and animals under immense heat and pressure. This process resulted in energy laden fuels coal, petroleum, and natural gas, which together have generated most of the energy consumed globally for over a century, paving the way for continued advancement and new inventions.
Fossil fuels are currently the most economically available source of power for both personal and commercial uses. Petroleum fuels our cars and thirst for plastics, while natural gas and coal heat and electrify our homes. Mass transportation is also largely propelled by fossil fuels. In 2005, more than 3/4 of total world energy consumption was through the use of fossil fuels. Petroleum led with over 43.4 percent of the world’s total energy consumption, followed by natural gas (15.6 percent) and coal (8.3 percent). North America is the largest consumer of fossil fuels, utilizing nearly 25 percent of the world’s resources.
Long thought to be inexhaustible, fossil fuels have been used extensively since the Industrial Revolution. However, many believe that the world is using fossil fuels at an unsustainable rate. Some experts believe that the world has already reached its peak for oil extraction and production, and that it is only a matter of time before natural gas and coal follow suit. These near-term concerns about oil supply have led to increasing focus on, and exploration of, alternative sources of petroleum, such as in tar sands and oil shale.
To release their stored energy, fossil fuels must be burned. It is during this combustion process that a variety of emissions and particulates, including ash, are released into the atmosphere. Primary releases are sulfur, nitrogen, and carbon, which can be harmful to the environment. They can combine with water vapor in the air to form acidic compounds that create acid rain, and burning fossil fuels releases carbon dioxide, a greenhouse gas that scientists believe is key factor in global climate change.
There are also environmental risks associated with extracting, transporting, and utilizing fossil fuels. Mining for coal and drilling for oil are especially hazardous because the digging of massive mines and wells can change the surrounding landscapes and bring massive amounts of salt water to the surface which can damage nearby ecosystems without proper treatment and sequestration. Natural gas extraction is somewhat safer, but can also be hazardous. While there are regulations in place that attempts to minimize the risks, it is impossible to eliminate them completely. However, regulation is not sufficient; there must be continued research in developing new technologies for both fossil fuel and renewable energy, in addition to increasing conservation measures.
Environmental Literacy Council
http://www.enviroliteracy.org/subcategory.php/21.html, access on March 14th, 2010.not valid statement found
According to paragraph 4 (lines 33-42), all the elements below result from the burning of fossil fuels, EXCEPT
Fossil Fuels
The twentieth century has been called the hydrocarbon century due to the abundance of fossil fuels, and their contribution to human development. Fossil fuels were formed over millions of years by the decomposing remains of plants and animals under immense heat and pressure. This process resulted in energy laden fuels coal, petroleum, and natural gas, which together have generated most of the energy consumed globally for over a century, paving the way for continued advancement and new inventions.
Fossil fuels are currently the most economically available source of power for both personal and commercial uses. Petroleum fuels our cars and thirst for plastics, while natural gas and coal heat and electrify our homes. Mass transportation is also largely propelled by fossil fuels. In 2005, more than 3/4 of total world energy consumption was through the use of fossil fuels. Petroleum led with over 43.4 percent of the world’s total energy consumption, followed by natural gas (15.6 percent) and coal (8.3 percent). North America is the largest consumer of fossil fuels, utilizing nearly 25 percent of the world’s resources.
Long thought to be inexhaustible, fossil fuels have been used extensively since the Industrial Revolution. However, many believe that the world is using fossil fuels at an unsustainable rate. Some experts believe that the world has already reached its peak for oil extraction and production, and that it is only a matter of time before natural gas and coal follow suit. These near-term concerns about oil supply have led to increasing focus on, and exploration of, alternative sources of petroleum, such as in tar sands and oil shale.
To release their stored energy, fossil fuels must be burned. It is during this combustion process that a variety of emissions and particulates, including ash, are released into the atmosphere. Primary releases are sulfur, nitrogen, and carbon, which can be harmful to the environment. They can combine with water vapor in the air to form acidic compounds that create acid rain, and burning fossil fuels releases carbon dioxide, a greenhouse gas that scientists believe is key factor in global climate change.
There are also environmental risks associated with extracting, transporting, and utilizing fossil fuels. Mining for coal and drilling for oil are especially hazardous because the digging of massive mines and wells can change the surrounding landscapes and bring massive amounts of salt water to the surface which can damage nearby ecosystems without proper treatment and sequestration. Natural gas extraction is somewhat safer, but can also be hazardous. While there are regulations in place that attempts to minimize the risks, it is impossible to eliminate them completely. However, regulation is not sufficient; there must be continued research in developing new technologies for both fossil fuel and renewable energy, in addition to increasing conservation measures.
Environmental Literacy Council
http://www.enviroliteracy.org/subcategory.php/21.html, access on March 14th, 2010.not valid statement found
Concerning the figures relative to the year 2005, as mentioned in paragraph 2 (lines 11-22)
Fossil Fuels
The twentieth century has been called the hydrocarbon century due to the abundance of fossil fuels, and their contribution to human development. Fossil fuels were formed over millions of years by the decomposing remains of plants and animals under immense heat and pressure. This process resulted in energy laden fuels coal, petroleum, and natural gas, which together have generated most of the energy consumed globally for over a century, paving the way for continued advancement and new inventions.
Fossil fuels are currently the most economically available source of power for both personal and commercial uses. Petroleum fuels our cars and thirst for plastics, while natural gas and coal heat and electrify our homes. Mass transportation is also largely propelled by fossil fuels. In 2005, more than 3/4 of total world energy consumption was through the use of fossil fuels. Petroleum led with over 43.4 percent of the world’s total energy consumption, followed by natural gas (15.6 percent) and coal (8.3 percent). North America is the largest consumer of fossil fuels, utilizing nearly 25 percent of the world’s resources.
Long thought to be inexhaustible, fossil fuels have been used extensively since the Industrial Revolution. However, many believe that the world is using fossil fuels at an unsustainable rate. Some experts believe that the world has already reached its peak for oil extraction and production, and that it is only a matter of time before natural gas and coal follow suit. These near-term concerns about oil supply have led to increasing focus on, and exploration of, alternative sources of petroleum, such as in tar sands and oil shale.
To release their stored energy, fossil fuels must be burned. It is during this combustion process that a variety of emissions and particulates, including ash, are released into the atmosphere. Primary releases are sulfur, nitrogen, and carbon, which can be harmful to the environment. They can combine with water vapor in the air to form acidic compounds that create acid rain, and burning fossil fuels releases carbon dioxide, a greenhouse gas that scientists believe is key factor in global climate change.
There are also environmental risks associated with extracting, transporting, and utilizing fossil fuels. Mining for coal and drilling for oil are especially hazardous because the digging of massive mines and wells can change the surrounding landscapes and bring massive amounts of salt water to the surface which can damage nearby ecosystems without proper treatment and sequestration. Natural gas extraction is somewhat safer, but can also be hazardous. While there are regulations in place that attempts to minimize the risks, it is impossible to eliminate them completely. However, regulation is not sufficient; there must be continued research in developing new technologies for both fossil fuel and renewable energy, in addition to increasing conservation measures.
Environmental Literacy Council
http://www.enviroliteracy.org/subcategory.php/21.html, access on March 14th, 2010.not valid statement found
Paragraph 3 (lines 23-32) introduces the idea that
Fossil Fuels
The twentieth century has been called the hydrocarbon century due to the abundance of fossil fuels, and their contribution to human development. Fossil fuels were formed over millions of years by the decomposing remains of plants and animals under immense heat and pressure. This process resulted in energy laden fuels coal, petroleum, and natural gas, which together have generated most of the energy consumed globally for over a century, paving the way for continued advancement and new inventions.
Fossil fuels are currently the most economically available source of power for both personal and commercial uses. Petroleum fuels our cars and thirst for plastics, while natural gas and coal heat and electrify our homes. Mass transportation is also largely propelled by fossil fuels. In 2005, more than 3/4 of total world energy consumption was through the use of fossil fuels. Petroleum led with over 43.4 percent of the world’s total energy consumption, followed by natural gas (15.6 percent) and coal (8.3 percent). North America is the largest consumer of fossil fuels, utilizing nearly 25 percent of the world’s resources.
Long thought to be inexhaustible, fossil fuels have been used extensively since the Industrial Revolution. However, many believe that the world is using fossil fuels at an unsustainable rate. Some experts believe that the world has already reached its peak for oil extraction and production, and that it is only a matter of time before natural gas and coal follow suit. These near-term concerns about oil supply have led to increasing focus on, and exploration of, alternative sources of petroleum, such as in tar sands and oil shale.
To release their stored energy, fossil fuels must be burned. It is during this combustion process that a variety of emissions and particulates, including ash, are released into the atmosphere. Primary releases are sulfur, nitrogen, and carbon, which can be harmful to the environment. They can combine with water vapor in the air to form acidic compounds that create acid rain, and burning fossil fuels releases carbon dioxide, a greenhouse gas that scientists believe is key factor in global climate change.
There are also environmental risks associated with extracting, transporting, and utilizing fossil fuels. Mining for coal and drilling for oil are especially hazardous because the digging of massive mines and wells can change the surrounding landscapes and bring massive amounts of salt water to the surface which can damage nearby ecosystems without proper treatment and sequestration. Natural gas extraction is somewhat safer, but can also be hazardous. While there are regulations in place that attempts to minimize the risks, it is impossible to eliminate them completely. However, regulation is not sufficient; there must be continued research in developing new technologies for both fossil fuel and renewable energy, in addition to increasing conservation measures.
Environmental Literacy Council
http://www.enviroliteracy.org/subcategory.php/21.html, access on March 14th, 2010.not valid statement found
“This process...” (line 6) refers to the
Fossil Fuels
The twentieth century has been called the hydrocarbon century due to the abundance of fossil fuels, and their contribution to human development. Fossil fuels were formed over millions of years by the decomposing remains of plants and animals under immense heat and pressure. This process resulted in energy laden fuels coal, petroleum, and natural gas, which together have generated most of the energy consumed globally for over a century, paving the way for continued advancement and new inventions.
Fossil fuels are currently the most economically available source of power for both personal and commercial uses. Petroleum fuels our cars and thirst for plastics, while natural gas and coal heat and electrify our homes. Mass transportation is also largely propelled by fossil fuels. In 2005, more than 3/4 of total world energy consumption was through the use of fossil fuels. Petroleum led with over 43.4 percent of the world’s total energy consumption, followed by natural gas (15.6 percent) and coal (8.3 percent). North America is the largest consumer of fossil fuels, utilizing nearly 25 percent of the world’s resources.
Long thought to be inexhaustible, fossil fuels have been used extensively since the Industrial Revolution. However, many believe that the world is using fossil fuels at an unsustainable rate. Some experts believe that the world has already reached its peak for oil extraction and production, and that it is only a matter of time before natural gas and coal follow suit. These near-term concerns about oil supply have led to increasing focus on, and exploration of, alternative sources of petroleum, such as in tar sands and oil shale.
To release their stored energy, fossil fuels must be burned. It is during this combustion process that a variety of emissions and particulates, including ash, are released into the atmosphere. Primary releases are sulfur, nitrogen, and carbon, which can be harmful to the environment. They can combine with water vapor in the air to form acidic compounds that create acid rain, and burning fossil fuels releases carbon dioxide, a greenhouse gas that scientists believe is key factor in global climate change.
There are also environmental risks associated with extracting, transporting, and utilizing fossil fuels. Mining for coal and drilling for oil are especially hazardous because the digging of massive mines and wells can change the surrounding landscapes and bring massive amounts of salt water to the surface which can damage nearby ecosystems without proper treatment and sequestration. Natural gas extraction is somewhat safer, but can also be hazardous. While there are regulations in place that attempts to minimize the risks, it is impossible to eliminate them completely. However, regulation is not sufficient; there must be continued research in developing new technologies for both fossil fuel and renewable energy, in addition to increasing conservation measures.
Environmental Literacy Council
http://www.enviroliteracy.org/subcategory.php/21.html, access on March 14th, 2010.not valid statement found
In “The twentieth century has been called the hydrocarbon century due to the abundance of fossil fuels, and their contribution to human development.” (lines 1-3), ‘due to’ can be substituted by
Fossil Fuels
The twentieth century has been called the hydrocarbon century due to the abundance of fossil fuels, and their contribution to human development. Fossil fuels were formed over millions of years by the decomposing remains of plants and animals under immense heat and pressure. This process resulted in energy laden fuels coal, petroleum, and natural gas, which together have generated most of the energy consumed globally for over a century, paving the way for continued advancement and new inventions.
Fossil fuels are currently the most economically available source of power for both personal and commercial uses. Petroleum fuels our cars and thirst for plastics, while natural gas and coal heat and electrify our homes. Mass transportation is also largely propelled by fossil fuels. In 2005, more than 3/4 of total world energy consumption was through the use of fossil fuels. Petroleum led with over 43.4 percent of the world’s total energy consumption, followed by natural gas (15.6 percent) and coal (8.3 percent). North America is the largest consumer of fossil fuels, utilizing nearly 25 percent of the world’s resources.
Long thought to be inexhaustible, fossil fuels have been used extensively since the Industrial Revolution. However, many believe that the world is using fossil fuels at an unsustainable rate. Some experts believe that the world has already reached its peak for oil extraction and production, and that it is only a matter of time before natural gas and coal follow suit. These near-term concerns about oil supply have led to increasing focus on, and exploration of, alternative sources of petroleum, such as in tar sands and oil shale.
To release their stored energy, fossil fuels must be burned. It is during this combustion process that a variety of emissions and particulates, including ash, are released into the atmosphere. Primary releases are sulfur, nitrogen, and carbon, which can be harmful to the environment. They can combine with water vapor in the air to form acidic compounds that create acid rain, and burning fossil fuels releases carbon dioxide, a greenhouse gas that scientists believe is key factor in global climate change.
There are also environmental risks associated with extracting, transporting, and utilizing fossil fuels. Mining for coal and drilling for oil are especially hazardous because the digging of massive mines and wells can change the surrounding landscapes and bring massive amounts of salt water to the surface which can damage nearby ecosystems without proper treatment and sequestration. Natural gas extraction is somewhat safer, but can also be hazardous. While there are regulations in place that attempts to minimize the risks, it is impossible to eliminate them completely. However, regulation is not sufficient; there must be continued research in developing new technologies for both fossil fuel and renewable energy, in addition to increasing conservation measures.
Environmental Literacy Council
http://www.enviroliteracy.org/subcategory.php/21.html, access on March 14th, 2010.not valid statement found
The text “Fossil fuels” can be classified as a
Observe o período:
Não vejo em qualquer pessoa o menor mal-estar ou conflito em estar só.
O plural do período acima, realizado de acordo com o registro culto e formal da língua e sem alteração do sentido, é
Conheça nossos planos