Giant oil companies across the United States are currently investing in Canada’s tar sands as part of their role in the Keystone XL pipeline, which would carry tar sands oil from Alberta all the way to Texas. The pipeline would double imports of tar sands oil into the United States and transport it to refineries on the Gulf Coast and ports for international export. The oil sands industry itself is undergoing a major expansion, powered by $19 billion a year in investments, according to Bloomberg News.