The most interesting part of President Obama's U.N. speech was what he didn't say.
More than a fifth of the country's garbage is food.
This week's U.N. climate summit is all about the long game.
Food is a necessity, but it's also a big business. That might be complicating things.
Blame climate change.
The average meat-eater in the U.S. is responsible for almost twice as much global warming as the average vegetarian.
A visualization of the growth of carbon-dioxide levels, which are higher than they've been in 800,000 years.
A U.N. agency blames humans for record heat that gripped parts of the world last year. Here are six key findings from its annual report.
Democrats in the Senate stayed up all night talking about the perils of climate change. But while there's hope that technology, changing consumer and business practices or new policies could finally turn the tide and slow or reverse climate change, there are also good reasons to think those efforts will fail.
The report found that blocking or approving the Keystone XL pipeline was unlikely to have a "significant" impact on climate change emissions.
Last year, China added far more fossil-fuel capacity than it did solar, wind, hydro, and nuclear power combined.
A closer look at whether natural gas can help the U.S. reduce its emissions.
The EU has a new plan to cut carbon-dioxide emissions 40 percent by 2030 — but also loosen its renewable energy goals.
U.S. electric utilities burned a bit more coal and a bit less natural gas last year.
A primer on the next big energy debate in Congress.
Since this keeps coming up, let's go back to basics.
But there's no real plan for what happens after that.
As soon as we quit spraying those reflective particles into the atmosphere, the Earth will heat up very, very, very rapidly.
Congress has created 42 different tax incentives for energy. Baucus wants to sweep them all away and replace them with just two.
Obama's new adviser, John Podesta, will push the White House to act more forcefully on climate change. Here's what he was advocating back in 2010.