Energy & Fuel

"When US government scientists began sampling the air from a tower north of Denver, Colorado, they expected urban smog — but not strong whiffs of what looked like natural gas. They eventually linked the mysterious pollution to a nearby natural-gas field, and their investigation has now produced the first hard evidence that the cleanest-burning fossil fuel might not be much better than coal when it comes to climate change."

"Pacific Gas and Electric Co.'s old gas lines are riddled with potentially lethal weld flaws, and new welding that the company's crews did during pipeline testing last year is suspect, two veteran welders told state regulators this week."

"An obstacle to greening L.A.'s energy portfolio is the Department of Water & Power's contract with a Utah plant, which requires the city to buy coal power until 2027. The gritty fuel is now stoking controversy over energy policy, environmental damage and how much consumers should pay to kick the habit."

"Ivanpah Valley, Calif. -- Construction cranes rise like storks 40 stories above the Mojave Desert. In their midst, the 'power tower' emerges, wrapped in scaffolding and looking like a multistage rocket."

"The U.S. government will require natural gas drillers to disclose which chemicals they use in hydraulic fracturing on public lands, according to draft rules crafted by the Interior Department."

"You wouldn't know it from the Republicans, but these are boom times for American energy. And you wouldn't know it from President Barack Obama, but he has very little to do with that."

"Federal authorities are planning to scale back a Bush-era push to open 2 million acres of public lands in the Rocky Mountain region for commercial oil-shale development — with support from Colorado agricultural, municipal and recreation industry leaders."