TransCanada said Tuesday that the proposed oil pipeline from Canada to Texas will have no measurable effect on global warming. Alex Pourbaix, the company's president for energy and oil pipelines, said opponents of the proposed Keystone XL pipeline have grossly inflated its likely impact on emissions of greenhouse gases that contribute to global warming. Pourbaix said that Canada represents only 2 percent of global greenhouse gas emissions, and that oil sands concentrated in Alberta, where the pipeline would start, make up 5 percent of the country's total. He said math indicates that oil sands represent just one-tenth of 1 percent of greenhouse emissions. Opponents contend that the pipeline would carry “dirty oil" that would add to climate change.
