A toxic substance found in snow near oil-sands operations could harm fish eggs, a new study suggests.
Billions of dollars in fines and manslaughter charges are key elements of a deal between the oil giant and the Justice Department, according to the Associated Press.
Will the ill-fated program ever start renting bikes? Well, yes. But, man, it's been slow.
Factory farms' overuse of antibiotics is threatening the efficacy of the drugs on humans.
A handful of California and Washington fueling stations are selling biofuel made with algae oil. Could cellulosic biofuels be far behind?
Activists are pushing for divestment from dirty energy companies. Let's couple that with investments in community-owned, small-scale renewables.
Lots of old, coal-fired power plants are expected to shut down in coming years, says the Union of Concerned Scientists. All that poor CO2, all dressed up with no place to go.
Climate change? Rising seas? Monster storms? Science can fix that, thanks to the miracle of geoengineering. Here's everything you need to know.
The U.S. is on track to become the world's top oil producer, says the International Energy Agency. Does that sound like good news? It's not.