He knew the mafia's toxic-waste dumping would doom people to die from cancer, and he eventually felt bad enough to do something about it.
Activists are pushing the U.S. government to crack down on trade practices that they say are harming native populations of bumblebees.
Under proposed new zoning rules, developers in Beantown will have to construct buildings that can handle floods, heat waves, and other climate impacts.
The U.S. plans to use its international clout to make it hard for all but the poorest countries to build coal-fired power plants.
The Cornhusker State is the third windiest in the union, but it ranks in the bottom half in terms of wind-power generation. Some state lawmakers are trying to change that.
The thin crust of ice floating around Antarctica expanded this year to cover a greater area than ever before, but that doesn't mean climate change isn't happening.
The U.S. has no central repository for nuclear waste, so it's piling up at power plants. Illinois now houses more of it than any other state.
California, Oregon, Washington, and British Columbia will work together to tackle climate change. The specifics are fuzzy, but hey, it's something.
Tony Abbott denies there's a link between global warming and the wildfires ravaging his country, and he's pushing to roll back Australia's carbon tax.