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LOS ANGELES (Reuters) - California's powerful air-quality regulator on Friday approved sweeping new rules to reduce greenhouse gas emissions from vehicles by requiring automakers to put many more electric and hybrid vehicles on the state's roads. The regulations, approved unanimously by the state's Air Resources Board at a meeting in Los Angeles, would also support development of an infrastructure for hydrogen fueling stations. [More]

It may be surprising to hear that hydraulic fracturing is not the cause of water contamination , but what may be even more surprising is that shale gas produced using fracking may have lower life cycle greenhouse gas emissions than conventional gas. According to a recent Environmental Science and Technology report , shale gas life-cycle [greenhouse gas] emissions are 6% lower than conventional natural gas [More]

By Dan Levine and Noel Randewich SAN FRANCISCO (Reuters) - A judge blocked one of California's signature attempts to lower greenhouse gas emissions, a victory for out-of-state ethanol producers and refiners that has California's air quality board vowing to appeal.

DURBAN, South Africa--For the first time, all major nations--developed and developing--have agreed to a roadmap that would combat climate change by reducing greenhouse gas emissions via an "outcome with legal force" that would not come into effect before 2020.

The federal government should begin a major effort to measure greenhouse gas emissions tied to the nation's booming natural gas industry , a Department of Energy advisory panel said today in a series of proposals on air and water quality issues.

California likes to think of itself as being ahead of the curve. So when the state set out to reduce greenhouse gas emissions, regulators did all the right things - stringent tailpipe standards for cars, tighter codes for buildings, higher renewable energy standards for utilities. Then they took one of the most aggressive energy-saving steps of all.

And so would trading beef for chicken. According to a new study, cultured meat production generates up to 96% fewer greenhouse gas emissions than conventional meat production, though it's still second to poultry in terms of energy efficiency. Lab-grown meat is going to be on your table someday.