"With turbines threatening some bird and bat populations, researchers are seeking ways to keep the skies safe for wildlife."

"A report finds that injecting carbon dioxide into underground rock formations, while a potential means of fighting global warming, could increase stresses on faults, leading to earthquakes."

"Alternative fuels are likely to remain more expensive than their petroleum counterparts and offer the military little advantage as it seeks to secure its access to energy supplies, according to government-sponsored studies released today."

"ELK POINT, Alberta -- There's been another oil spill in Alberta, this time northeast of Edmonton."

"The federal government could soon give the final go-ahead for Royal Dutch Shell to begin drilling for oil in the Arctic Ocean. Shell has spent $4 billion since 2007 to prepare for this work, and is hoping to tap into vast new deposits of oil."

"But the plan to drill exploratory wells is controversial — opposed by environmental groups and some indigenous people as well.

"Japan approved on Monday incentives for renewable energy that could unleash billions of dollars in clean-energy investment and help the world's third-biggest economy shift away from a reliance on nuclear power after the Fukushima disaster."