"Even if foes of the Keystone XL pipeline block it, companies seeking to get Canada’s oil sands to U.S. and world markets could travel the old-fashioned way: by rail."

"Environmentalists have a hope. If they can block the Keystone XL pipeline, they can keep Canada from developing more of its dirty tar sands oil. It takes a lot of energy to get it out of the ground and turn it into gasoline, so it has a bigger greenhouse gas footprint than conventional oil. But the State Department report, which was released Friday, says Keystone won't have much of an impact on the development of that oil from Alberta."

"Event billed as largest climate protest in US history intended as show of force as Obama nears decision on controversial project."

"Autism certainly involves the brain, but researchers increasingly believe it is actually a collection of problems that affects the whole body, the accumulation of seemingly minor events that start in the womb. PAULINE TAM unravels the complexity of factors that combine to cause the disorder."

"A bid by [Canada's] federal government to impose sweeping confidentiality rules on an Arctic science project has run into serious resistance in the United States."

"Canada's offshore petroleum boards are not equipped to cope with a major spill, the country's environmental watchdog warned on Tuesday in a report that also said the booming energy sector needed more oversight."

"VANCOUVER, B.C. -- Canadian environmental groups today warned that a new proposal by Kinder Morgan pipeline company would "exponentially" raise the risk of a major oil spill in the Salish Sea's most populous region, including the cities of Vancouver and Victoria."

"More than half the Senate on Wednesday urged quick approval of the Keystone XL oil pipeline, ramping up pressure on President Barack Obama to move ahead with the project just days after he promised in his inaugural address to respond vigorously to the threat of climate change."