"It’s official — the Empire State Building has been awarded LEED Gold certification. Thanks to a massive green overhaul that took more than two years, the landmark is now the tallest building in the United States to receive LEED certification. "

"U.S. power plants can comply with new environmental rules without disrupting the supply of electricity if providers and local authorities have time to plan for the changes, energy regulators told congressional Republicans seeking to unwind the rules."

"Two weeks after the bankruptcy of a solar company that got $527 million in government loans, the House Energy and Commerce Committee will hold a hearing on Wednesday to explore what went wrong."

Hundreds of anti-fracking protestors rallied outside a Marcellus Shale industry conference in Philadelphia. Aubrey McClendon, the chief executive of Chesapeake Energy Co., called people concerned about the safety of their families' drinking water "extremists," even as an industry-friendly report noted that fracking could be costly to communities.

"So far 2011 has been a good year f0or wind energy projects. Installations in the first six months of 2011 were almost double what they were in the comparable period in 2010 in terms of total megawatts (2,151 versus 1,250), according to the American Wind Energy Association. But a bipartisan coalition of 24 state governors, fretting that the industry could lose momentum, has already begun lobbying the Obama administration to improve business conditions for wind energy developers."

"BP Plc is looking to ramp up activity in the Gulf of Mexico in the coming months and is applying for new well permits there this quarter, an executive said on Tuesday, as the firm looks to move on from a huge oil spill last year."

A group of nine Nobel Prize winners called on President Obama to reject the Keystone XL pipeline.