Probiotics and Prebiotics: What’s Really Important

(Available at: https://www.health.harvard.edu/nutrition/are-you-getting-essential-nutrients-from-your-diet/ - text especially adapted for this test).

(Available at: https://dictionaryblog.cambridge.org/2023/10/25/the-calm-before-the-storm newspaper-idioms/

-text especially adapted for this test). 

An archaeologist talks trash

Author, UChicago Asst. Prof. Sarah Newman reframes history of waste in her new book

(1º§) Seeing constant images of floating trash islands and overwhelmed landfills can make it seem as though garbage has been a problem piling up for all of human existence.

(2º§) Book cover for Unmaking Waste by Sarah Newman. Cover has a blue background with grey and white images of trash items. However, UChicago Asst. Prof. Sarah Newman wants to dispose of this simplified version of history. In "Unmaking Waste: New Histories of Old Things," she argues that "waste is neither universal nor self-evident." The anthropological archaeologist claims that waste—what we deem "unwanted"—is a relatively recent idea.

(3º§) According to Newman, Western assumptions about waste begin with an imagined long, dirty stretch of "ancient past" broken up by a few expectations like a gleaming Rome (which Newman says is nastier than we think). In traditional histories of trash, this is followed by a filthy, unwashed Middle Ages leading into a dawning awareness of hygiene, public health and sanitation.

(4º§) Newman moves away from this sanitized narrative and heads to ancient Mesoamerica where the story of waste is far from linear. Using examples and archeological evidence from before and during colonization, Newman shows that people have thought about—and used—"trash" in many different ways.

(5º§) Q: What drew you to study the history of waste?

(6º§) I got interested in the history of waste during graduate school, while I was working at an ancient Maya city called El Zotz, in northern Guatemala. Over a couple of field seasons, archaeologists from our team uncovered unusual, very dense deposits of artifacts in the palace at the city's center.

(7º§) Basically, they were things that seemed to be ancient trash because they were burnt, broken and scattered, but they were also things that didn't seem to be ancient trash because some of the materials were rare or valuable.

(8º§) This made me wonder not only how exactly other archaeologists and I were classifying ancient artifacts as trash or not-trash, but also whether people in the past even had something like the category of "waste" that we have today.

(9º§) Q: In what ways has "trash" defined archaeology and in what ways has our understanding of waste been defined by archaeologists?

(10º§) Archaeology has sometimes been called "the science of rubbish." Although meant to be something of a joke, this also reflects an assumption that archaeologists usually deal with things that people have left behind because they are unwanted or useless. That may be true in some cases, but people also leave things behind that are valuable or serve a specific purpose (such as a burial or an offering).

(11º§) Archaeologists are the ones who decide whether or not what we find is or is not trash, but we don't do that in a vacuum—we can't help but be influenced by the ways the societies that we come from decide what is or is not trash.

(12º§) For example, in the mid-20th century, when the U.S. was celebrating postwar production and consumerism, archaeologists tended to view ancient trash the same way most people viewed modern trash: as evidence of technological progress. With the rise of environmentalism, however, people (including archaeologists) were suddenly more conscious of the trash they themselves were making and we started to view ancient trash and ways of discarding it as reflections of broader social structures.

(13º§) I also think archaeology has had a role (even if an unintentional one) in making trash appear to be an inevitable, even natural fact of life—imagining that our ancestors have been making waste for many thousands of years gives us a convenient excuse for all the trash we make today.

(14º§) Q: You talk about how trash has some mirror-like qualities. What can our trash tell us about ourselves?

(15º§) If you were to imagine someone you know going through the contents of your trash can right now, it would probably make you uncomfortable. Think about all the things someone would learn about you—what you've eaten recently, what newspapers or magazines you've read, what kinds of health or beauty products you use, maybe even some financial details, just to name a few.

(16º§) When I'm teaching about trash, I often use an incredible series of photos by Gregg Segal called "7 Days of Garbage" to illustrate this point. Sometimes I remove the individuals in the portraits and ask my students to describe the missing people just from their trash. It's surprising how much the students can tell about the people—the products and packaging reveal details about family composition, socioeconomic status, ethnicity, gender roles, tastes and hobbies, etc.

(17º§) Q: What are some interesting ways that people have thought about or managed waste in the past?

(18º§) One of the things I write about in the book is the way that the Aztec capital of Tenochtitlán (now Mexico City) had a sophisticated system of waste management in place in the early sixteenth century—a time when many European cities were plagued by garbage-lined streets, clogged gutters, and the indiscriminate dumping of bodily wastes and animal remains.

(19º§) Spaniards described the size and structures of Tenochtitlán with wonder, but they also marveled at the order and cleanliness throughout the city. Several accounts note that an army of laborers were constantly at work sweeping and whitewashing the streets, temples, stairways, courtyards, and houses.

(20º§) One conquistador even describes a system of public latrines, hidden from sight with reeds or grass, from which excrement was collected and reused as agricultural fertilizer. The same account also mentions that canoes full of human waste were sold at the local marketplace, where it was then used in tanning animal hides. Bodily waste could also sometimes be used as a religious offering, especially in acts of penitence.

(21º§) Q: What are some of the common myths we have about trash?

(22º§) The biggest myth about trash is simply that we talk about throwing things "away." There is not, nor has there ever been, an "away" for things to go. As inhabitants of industrialized cities, we often think of landfills as places set apart for things to decay, deteriorate and vanish, but in reality, landfills tend to offer ideal conditions for preservation.

(23º§) Not only do materials refuse to disappear, but the things we think we discard make their way back to us, into our very bodies. Of all the plastic waste ever created—billions of metric tons—about 9% has been recycled. The rest has been found, often reduced to microplastics, everywhere from the Mariana Trench to the top of Mount Everest and from human breast milk to human blood.

(24º§) The title of my book is really about this myth—there is no unmaking our actual waste, but I think we can unmake the idea that it is an inevitable part of human life.

https://news.uchicago.edu/story/archaeologist-talks-trash

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Green shoppers around the world

If you want to be a responsible consumer, think about not just how much you buy, but also about what’s good for the planet. Green Shoppers United is an international non-profit organization for the promotion of responsible consumerism.

Labels

Read the labels. Some...................the ingredients that manufacturers use in products, such as cosmetics or toiletries, can damage the environment. Some ingredients are only used...................make things prettier, or more colorful, but they might also be harmful. Don’t buy things that contain substances that harm you or the world you live................... For example, research shows a potential link...................the preservatives called parabens, often found in beauty products, and some types of cancer. 

Transport

In today’s global economy, it is easier for companies to buy products and materials where they’re cheap, and transport them over enormous distances to get them to customers. If you can, buy things locally. The local food movement has grown steadily in recent years, and it’s often possible to track down locally grown, or produced, products, rather than those that have been transported long distances. If we stop buying goods that have had to fly over continents to get to us, companies may stop transporting them around unnecessarily. A bargain may cost you less personally, but the real price we pay for it in the long run may turn out to be too high, as jet fuel continues to pollute our environment. 

Environment 

Responsible consumers recycle to reduce waste, and its negative impact on our environment. A lot of the plastic packaging we use for food and drink is recyclable, but not all of it. The most common packaging materials are still non-recyclable polyethylene and PVC. Seventy million tons are used every year. Look at the recycling labels carefully. Manufacturers should use recyclable plastics, like PET, wherever possible. Some have also begun using lighter materials, for example, 30% lighter PET plastic for drinks bottles, to reduce the amount of plastic waste. Transporting lighter materials is cheaper, and uses less fuel, too – so the solution may actually benefit everyone. 

Packaging

We’ve all purchased products wrapped in foil, then sealed in a bag, and then put in a box. Why? Write to companies that you think produce wasteful packaging. Ask them to think about what’s really necessary. Make them realize they can save money by using less packaging and, at the same time, help save our planet.

Consumers

A lot of us expect products these days to be more environmentally friendly. However, research has shown that we don’t want to pay more, and we don’t want to compromise on the quality of products, either. For example, one manufacturer recently had to switch back to less environmental packaging of potato chips, just because customers didn’t like the noise their “green” bags made when they were opened! Think about the effects of your shopping choices. Buy less to save the world, and join our effort to make shopping greener!