2011 saw a record high in carbon dioxide emissions, with China’s contribution growing the most.

Climate change is a boon for one species, at least: The brown argus butterfly, previously rare, has been staking out more turf for itself as the areas north of its range become warmer and more hospitable.

With the chair of the Nuclear Regulatory Commission on his way out, the president nominated Allison Macfarlane to take his place.

Negotiations for the Rio+20 summit are "painfully slow," says U.N. Secretary General Ban Ki-Moon.

Now China's accusing the U.S. of violating free-trade rules in clean energy development.

Radiation from Fukushima won't increase the risk of cancer for any Japanese people -- except a bunch of babies from a nearby town. Whatever! Just babies!

Making hydrogen with an "artificial leaf" isn't any cheaper than making hydrogen from fossil fuels.

Nuclear Regulatory Commission Chair Gregory Jaczko put in his resignation. Not because word got out that he's a bully! Just because, you know, he had "a feeling now was the right time."

Iran's oil exports are already slowing as the European Union's embargo deadline nears.

The Humane Society went inside a pig farm and found all sorts of abuse.

Eating organic food makes people more judgmental about others' actions and less altruistic, according to a totally bogus study.

The U.S. is selling drones to Iraq to protect oil exports.

White-tailed deer are eating so many leaves, they're keeping migratory birds from being able to build their nests.

The Commerce Department announced that the U.S. could put tariffs of up to 250 percent on Chinese solar panels imported into the country.

It's Bike to Work Day!

First the Arizona Congress wanted crazy legislation to ban all government work on sustainability, now it's the New Hampshire Congress. So trendy!

Australia just experienced the 60 hottest years in the past millennium, according to a new report. And natural causes don't explain the shift.

China's grid is not set up to deal with renewables.

Anti-whaling captain Paul Watson, president of the Sea Shepherd Conservation Society, was detained in Germany for a decades-old violation of navigational regulations.

Photo by NASA.

The Western U.S. is getting an annular eclipse this weekend, which is an eclipse where the moon's shadow turns the sun into a "ring of fire." A swath of the country from Oregon down to Texas will see the whole enchilada, and most other Westerners will get to see at least a partial eclipse. Those of us on the East Coast are SOL until 2017.

The national average temperature over the past 12 months was the hottest ever recorded.

Thanks to fracking, North Dakota now produces more oil than any other than state except Texas.

Environmental groups protested drilling in the Arctic Sea outside the White House yesterday.

We'd need one and a half Earths to fulfill all the demands we put on the planet in 2008 -- and it's getting worse.

The Department of the Interior moved forward with the Atlantic wind transmission line, a Google-funded underwater power line that would bring offshore wind energy to 2 million homes.

Hawaii's beaches are eroding away.

Gas prices are falling.

Americans are willing to deal with a 13 percent hike in electricity bills if it means more of their power will come from clean energy.

Twenty-six states are fighting for schools to teach evolution and climate change -- a welcome change from school reformers who want to tear down those ideas.

Right under Japan's Mount Fuji is a fault that could result in a magnitude-7 earthquake.