Most farmed fish are fed pellets made of smaller fish -- not a great idea if you want to protect ocean ecosystems. So researchers are trying out alternative diets.
As ice and snow melt, the surface of the Arctic is getting darker, and that's causing it to absorb more heat. A new study finds this problem is worse than expected.
The president continues to push past Congress and take action against climate change, this time with new fuel-efficiency standards for large trucks.
The tea business can be pretty ugly, so tea giants now say they have a plan to get greener and turn tea into a "hero crop" by 2030.
The U.S. is trying to smash open solar-panel trade barriers in India, even while trying to protect American panel manufacturers from imports.
The residents of Greene County, Penn., just weathered a fracking disaster, but it's cool because Chevron's buying them a pizza party (for one).
Blame fracking. In the boomtown of Williston, N.D., a 700-square-foot, one-bedroom apartment can cost more than $2,000 per month.
The secretary of state argues that global warming is as much of a threat as terrorism, epidemics, poverty, and WMDs.
The president has proposed a "climate resilience fund" that would help the nation get ready for big changes.