MaRS

"The expansion of the Keystone XL pipeline has become a lightning rod for the battle between long-term climate concerns and shorter-term economic benefit. Opponents say Canada's tarsands are one of the world's most carbon-intensive and environmentally destructive sources of oil. Proponents argue they're a politically stable source of oil in a world fraught with risk. Both are correct. A compromise on Keystone is essential if Canada is to become a responsible energy superpower in the complex 21st century world of carbon constraints. "