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University researchers claim crops could help cool Earth, in just one inventive suggestion being made to prevent climate change. The study, from Bristol, says that crops with larger, shinier leaves could reflect more heat back into space.

2010-11-11

 climate change leaf plant reflection
Peruvian foraging societies were already chewing coca leaves 8,000 years ago, archaeological evidence has shown. Ruins beneath house floors in the northwestern Peru showed evidence of chewed coca and calcium-rich rocks.

2010-12-02

 coca cocaine Peru leaf Bolivia archeology drug medicine history tradition