A group of Canadian green energy and technology companies pitched for investment on Wednesday, saying they are poised to flourish from government stimulus spending and tougher environmental regulations.

In the tense debate between energy security and environmental sustainability, Canada

The Canadian government plans new regulations that will effectively phase out traditional coal-fired power stations, Environment Minister Jim Prentice said in an interview published on Wednesday.

He told the Globe and Mail newspaper that new coal plants would have to include technology to capture greenhouse gas emissions and inject them underground for permanent storage.

California's new low-carbon fuel rules may be a violation of NAFTA and World Trade Organization provisions because they would unfairly limit exports of crude from Canada's oil sands to the state, a prominent Canadian trade lawyer said on Friday.

Canadian environmental groups asked regulators on Wednesday to rescind approvals for part of a $13.7 billion expansion of Royal Dutch Shell Plc's oil sands project, alleging the company backed off promises to cut greenhouse gas emissions.

Eight carbon capture and storage projects in Western Canada will share C$140 million ($114 million) in funding from the Canadian government, Natural Resources Minister Lisa Raitt said on Thursday.

A bomb has damaged a natural gas pipeline in north eastern British Columbia, police said Thursday, describing the attack as the second of its kind in the same area in a week.