The State Secretary dropped by the Lima climate talks to implore delegates to reach accord.
It's tough going at the climate talks, where a draft agreement is getting longer instead of shorter.
State mandates and tax incentives make California the most popular state for buying an electric car.
High-level climate talks began on Tuesday, dominated by doubts about rich countries' financial pledges.
Low oil prices means people will drive more and buy less efficient vehicles, increasing CO2 emissions.
American political dysfunction could keep legally binding rules out of the next climate pact.
CO2 emissions warm the planet faster than previously thought, and their impacts linger for centuries.
Climate finance fell for the second year in a row to well below levels needed to meet the world's climate goal.
Palm oil production can damage the local environment and global climate but solutions are out there.
Industrial farming is rapidly destroying Brazil's Cerrado and creating a ticking carbon bomb.
Following news of his climate pact with China, Obama will announce billions of dollars in climate aid.
For too long we have ignored the relationships between built and natural environments.
An innovative farm is hoping to score a win-win by producing crops while reducing power grid waste.
European Union will decide this week how hard the continent will work to slow global warming.
LEDs could help slow global warming and illuminate the developing world. Now that's worth a Nobel Prize.
Seattle's city council voted to make composting mandatory, with fines for homes that don't comply.
A new report shows how the world could become wealthier by spending more on clean energy infrastructure.
The world's biggest greenhouse gas emitter might be getting serious about kicking its coal habit.
Roads can disrupt the natural world, but new research lays out how to help the two coexist.
Landscape changes in the warming Sierra Nevada may have major impacts on California’s economy.