Investigate one of the following topics:
fossil fuels and...
a) agriculture
b) economy
c) medicine
d) China's coal use
e) environmental problems
f) international relations
Biofuels can provide energy without the reliance on environmentally harmful fossils fuels -- but scientists are still searching for a plentiful source. Craig A. Kohn demonstrates how cellulose, the naturally abundant tough walls of plant cells, might be the solution.
Where on Earth can our energy-hungry society turn to replace oil, coal, and natural gas? Read this National Geographic article to learn more.

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