Brazilian President Dilma Rousseff says she's serious about confronting climate change, but then why did she appoint denier Aldo Rebelo?
It took more than two years, but the ocean-borne radiation from the Fukushima Daiichi plant is finally detectable on U.S. shores.
A few Republicans and conservative groups are calling for a hike in the tax to pay for roads and other transportation infrastructure.
It turns out that what's healthier for humans is also healthier for the climate.
He's calling for 50 percent of the state's electricity to come from renewables by 2030, and for a big cut in gas consumption by cars and trucks.
For the first time in recorded history, temps in Anchorage didn't drop below zero all year. Alaskans are freaked out.
The state board of education is introducing nonsense into teaching guidelines for climate change.
The new GOP-led Senate is pushing the pipeline as its first priority this year. Will Obama respond with a veto?
The interactive map shows, in real time, exactly who is spewing smog.