Its environmental footprint is far from itty-bitty.
One city. One volunteer. 15,000 trees.
There are better ways to save Asian rainforests.
There seems to be no end to the ways fossil fuels can harm us.
We're on track for a worst-case scenario.
Trump's ethanol plan would be good for farmers, terrible for your lungs.
Is it a breakthrough, or just a buzzword?
Those little paws leave a big environmental footprint.
Northern states might actually profit as the planet warms.
If we want a smooth transition into a sustainable future, we need to act fast.
One small change in your diet could mean less gas for everybody.
This technology uses snowfall in the winter to keep you cool in the summer
Going old school with some new tools
Scientists say no
A scientist explains
Say goodbye to those packing peanuts you love so much
The program will make China the world's biggest carbon market
Time to clean up
Climate scientists routinely face death threats, hate mail, nuisance lawsuits and political attacks. How much worse can it get?
The commodity crunch that could turn the tables on clean energy
It takes more than turning off the lights, but it's all doable.
Time to turn words into action.
What's left when the Environmental Protection Agency throws facts out the window?
Creating future Olympic venues requires thinking about how they will be used far into the future.