“more than 3/4...” (lines 16) refers to the quantity of fossil fuels reserves consumed along the year.

“...over 43.4 percent...” (line 18) refers to the share that oil represents in the overall quantity of energy consumed globally.

“15.6 percent” (lines 19-20) refers to the amount of natural gas resources annually consumed in North America.

“8.3 percent” (line 20) refers to the share of coal used only for heating American homes.

“...nearly 25 percent...” (line 21) indicates the percentage of fossil fuels saved in North America.