"The C$16.2 billion ($15.4 billion) Mackenzie pipeline in Canada's Arctic should be allowed to proceed, provided 176 recommendations aimed at securing socioeconomic benefits and minimizing environmental damage are followed, regulators ruled on Wednesday."

"The Harper government is quietly reviewing the $1.9-billion investment by a state-owned Chinese oil company in two oilsands projects, more than a month after the deal was originally supposed to close."

A plan for the world's largest solar array in California promises clean energy -- but critics say green energy isn't always green.

After a perceived shortage of gasoline refineries a few years ago, five U.S. refineries have shut down this year. Refiners seem convinced that -- even after the economy recovers -- demand will not grow much.

"A proposal to move large amounts of wind and solar power out of the Southwest by linking the three separate North American electricity grids with state-of-the-art switching terminals and superconducting cables is now in hands of federal regulators."

"Millions of households across America are taking a first step into the world of the 'smart grid,' as their power companies install meters that can tell them how much electricity they are using hour by hour -- and sometimes, appliance by appliance. But not everyone is happy about it."

"Wind turbines can kill a few Indiana bats without endangering the species but the owners must ask for permission first, U.S. District Judge Roger Titus ruled on Dec. 8. Titus blocked construction of 82 turbines in Greenbrier County, W.Va., and restricted 40 turbines already under construction to seasonal operation."

"An Ithaca environmental activist and 6,000 other individuals and organizations asked the governor Tuesday to withdraw the state's newly drafted regulations on natural gas drilling, saying the state's entire regulatory framework needs to be strengthened before more drilling occurs."

"Many major automakers have unveiled vehicles at the L.A. Auto Show that are within a year or two of the showroom, but a lot has to change for such cars to be common sights in the U.S. private fleet."

"The Environmental Protection Agency said Monday that it would probably increase the amount of ethanol that gasoline retailers could blend into ordinary fuel, to 15 percent, if tests established that the blend would not damage cars."

"As America's petroleum heartland, Texas isn't known for being environmentally sensitive. But its oil-boom, energy savvy attitude could put the state in a surprising position--leading the charge to alternative energy in the U.S."

"A large Southern utility said Tuesday that it would close 30 percent of its North Carolina coal-fired power plants by 2017, a step that represents a bet that natural gas prices will stay acceptably low and that stricter rules are coming on sulfur dioxide emissions, which cause acid rain."

"The Environmental Protection Agency has put off, until the middle of next year, any decision about whether to increase the amount of ethanol allowed into the nation’s fuel."

Hoping to please the farm lobby, Congress ordered the nation's gasoline refiners to blend more ethanol into the fuel Americans use. But fuel demand falling because of the recession and more efficient vehicles has made this impossible.

"The Canadian and Alberta governments said on Tuesday they will invest as much as C$558 million ($525 million) in a pipeline project to carry carbon-dioxide from an industrial region near Edmonton, Alberta, to aging oil fields."