The Sierra Club has a new ranking of U.S. colleges and universities, and the greenest of them all is Vermont’s little Green Mountain Gollege, which uses lots of biogas.

Kumi Naidoo, Greenpeace’s International Executive Director, sat down with Reuters in San Francisco and chatted about the US Senate climate bill and where the non-profit is focusing its campaigning energies.

We took a short spin in a Tesla to see what an all-electric sports car was like.

There is currently no commercial fishing conducted in U.S. Arctic waters, and now there won’t be: a formal ban on commercial seafood harvests in U.S. waters north of the Bering Strait went into effect on Thursday.

The biggest greenhouse gas emitter in California isn’t in California.

Here’s some advice for Californians who think California Governor Arnold Schwarzenegger’s climate change policy goes too far: just be happy you’re not his kid.

The seven seas get a single U.S. approach in a draft federal plan for oceans released on Thursday.

Stephan Dolezalek, Managing Director of VantagePoint Venture Partners and Tom Werner, Chief Executive of SunPower, sat down at Reuters’ Global Climate and Alternative Energy Summit in San Francisco and shared their views on global warming and its influence on investment and adaptation within the clean tech sector.

Ken Oshman, the Chief Executive of Echelon, sat down at Reuters’ Global Climate and Alternative Energy Summit in San Francisco to speak about revenue forecasts and smart meters.

The following is Oshman’s thoughts on what private equity companies may do once the market picks up.

Scott Lang, the Chief Executive of Silver Spring Networks, sat down at Reuters’ Global Climate and Alternative Energy Summit in San Francisco to talk about building and expanding within green tech sector.

Here Lang discusses how his company’s technology for reporting power consumption to utilities may change the way electricity is used.

John Woolard, BrightSource CEO, sat down at Reuters’ Global Climate and Alternative Energy Summit in San Francisco to talk about energy efficiency, project financing and the future of carbon-free power. His advice: build fast.

Sierra Club’s grades of U.S. college and university green credentials focus on how the institutions directly affect the environment. Building efficiency, where food is from, waste management; it’s arguably a list of which schools are walking the green walk.

The subtitle of Senate leader Harry Reid’s Monday clean energy conference was ‘jobs’ and the unofficial subtitle was: ouch!

Large diameter trees are not doing well in California’s Yosemite National Park — there were 24 percent fewer in a recent decade than the 1930s.

Microsoft Corp Chief Research and Strategy Officer Craig Mundie — the guy in charge of the company’s $9 billion research budget and deep thinking — sat down with Reuters to talk about clean energy — carbon free, not necessarily renewable, in his view. Following are a couple of excerpts.