From fence-sitting Democrats to John Kerry’s hip surgery, clean energy legislation has faced a number of obstacles in the Senate. Can a bill still make it through Congress before international climate talks in Copenhagen this December?
We're in the midst of a national debate about health-care reform. What better time to design a system strong enough to cope with the new wave of diseases that will accompany climate change and globalization? First up: dengue fever.
Elephants and lions used to roam the Great Plains, and some scientists would like to put them back. But can we really hope to restore the world to its "original" state?