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Fossil fuels are organic (carbon-based) compounds derived from decomposed plants, algae, and other organisms buried in rock layers for hundreds of millions of years. poster yourself
12.2
Oil supplies over 40 percent of U.S. energy demands and over 99 percent of fuel for cars and trucks, according to the U.S. Department of Energy (fig. 12.4). poster yourself
We have already used more than 0.5 trillion bbl—almost half of proven oil reserves.
Competition has already raised oil prices, from around $15 per barrel in 1993 to more than $150 per barrel in 2008.
