Ecuador has pulled the plug on a groundbreaking plan to have outside donors pay to protect an oil-rich swath of the Amazon. The plan failed to draw anywhere near the financial support the country had hoped.
A new study links a 2011 earthquake in Oklahoma to wells containing waste water from oil and gas extraction.
As the UK gears up to start a gas-fracking industry, government and industry say they're determined to avoid the mistakes made in the US. But observers differ as to whether the country is better prepared for the risks.
Two years after the Fukushima nuclear disaster, renewable energy is surging in Japan. But economic pressures are also helping revive support for nuclear power, leading to an internal tug-of-war over Japan's energy future.
As millions of more Chinese enter the middle class, many are demanding a key passport to that lifestyle: a car. Millions throughout the developing world have the same demand. The world can't sustain this. One possible solution: car sharing.
Coal use is at 40-year lows here in the US but it's another story in Europe, where it's on the rise. And as Gerry Hadden reports from Spain, that means trouble for the EU's commitment to cutting CO2 emissions to combat global climate change.