Estimated U.S. gas reserves have increased by 35 percent, according to a group of experts connected with the Colorado School of Mines -- although much of that increase would come from hydraulic fracturing of shale, a technique whose effects raise environmental concern.

"For decades, diesel trucks and buses have spewed large amounts of soot, smog-causing gases and carcinogens into the air. But new diesel engines are more than 90 percent cleaner than a few years ago, far exceeding the emission reductions required by the U.S. Environmental Protection Agency, according to a new independent study released Thursday. Data show new diesel technologies are working even better than expected."

"A Senate energy bill was voted out of committee yesterday, but not before losing the support of two Democrats and a dozen leading environmental organizations."

"Four power companies are expected to split $18.5 billion in federal financing to build the next generation of nuclear reactors."

"The European Commission and the U.S. Environmental Protection Agency agreed today to implement new higher energy-efficiency specifications for computers, copiers and printers under the EU-US Energy Star Programme."

"By the middle of next year, the nine campuses that make up the nation's largest community college system plan to be completely energy self-sufficient. It's a huge step, and it will begin saving money immediately."

Small-scale, local power generation could reshape our energy system.

"If you’re thinking about buying a cleaner, more fuel-efficient car, you might think a hybrid is your best option. But some automakers want people to look at an older technology when they’re looking for green cars: the diesel engine."

There is a debate in Congress over the wisdom of a massive expansion of the U.S. electrical grid.

"The Senate Energy and Natural Resources Committee today approved the repeal of mandatory royalty waivers, also called 'royalty relief,' required under a 2005 energy law for certain offshore oil and gas production."

"The leases, auctioned near the end of the Bush administration, were blocked by Obama's Interior Department. Now a report opens the door to 30 of them being reissued."

"The Obama administration gave conditional support today for a federal-industry partnership that would build an advanced coal-burning power plant in Illinois to trap and store carbon dioxide emissions, reversing a Bush-era decision to abandon the FutureGen project."

"A Canadian service station today became the first in the world to sell gasoline blended with biofuel made from wheat straw."

"Biofuel and farm groups objected to the U.S. EPA's revisions to the National Renewable Fuel Standard today at a public hearing in Washington."

"Google Inc is closing in on its goal of producing renewable energy at a price cheaper than coal, the company's so-called green energy czar, the engineer in charge of the project, said on Tuesday."