Former EPA chiefs who served under four Republican presidents are backing the Obama administration's efforts to regulate CO2 from power plants.
The city council also moved to divest from fossil-fuel stocks.
SolarCity, the leading residential panel installer, is buying a solar manufacturer and planning to build a huge panel factory in New York.
If the city council OKs the plan, Berkeley motorists would be confronted with a "CO2 Alert" every time they fill up their tanks.
The U.S. is proposing to double the area of protected ocean with the expansion of the Pacific Remote Islands Marine National Monument.
Clinton is promoting her new book "Hard Choices," but she's dodging a choice on the controversial pipeline.
The brothers and their allies are gearing up to spend $290 million on this year's elections, including money for a new energy initiative.
Nicholas Stern of the famed Stern report has a new paper arguing that we're relying on a drastically outdated economic model.
EPA administrator Gina McCarthy went ahead and all but declared the Obama administration’s war on coal on Real Time with Bill Maher.