Climate Week spurs new pledges from businesses, KLM to power its planes with a biofuel mix, Google and Facebook dump their ties to ALEC, and more news of the week in clean energy solutions.

Rockefeller family foundation to divest from the very fuels that built their fortune, U.S. Navy orders 100 million gallons of biofuels, novices build a wind generator from scratch, and more stories of the week in clean energy.

Solar and wind reap worldwide benefits from German shift to renewables, World Bank expects carbon pricing news at next week's summit, climate change versus the birds, and more stories of the week in clean energy solutions

U.S. to curb carbon emissions from air travel, protestors block oil train north of Seattle, BP faces $18 billion penalty for Deepwater Horizon blow-out, and more stories of the week in clean energy solutions.

Banks predict transformation for electric utilities, blunt warnings ahead in the IPCC report, power companies and regulators look for new pricing schemes, and more news of the week in clean energy solutions.

Court rules for making the power grid friendlier to renewables, Western drought so bad that the mountains are rebounding, China's coal use actually declines, and more stories of the week in clean energy solutions.

Vermont breaks ground on a solar-powered microgrid, Oregon rejects Ambre Energy's coal export plan, acidic ocean waters get attention coast to coast, and more stories of the week in clean energy solutions.

The carbon-storage skills of ants and the biofuel potential of tobacco; energy efficiency financing surges, and Beijing bans coal. All that and more in this week's ClimateCast.

Economic risks of climate change, severe drought and forests on fire, Fortune 500 companies embracing renewable energy, electric vehicles and utilities; and much more.

California flooded with proposals for grid storage; narrow escape from oil-spill disaster in Seattle; climate change impacts our mental health; and much more.