AlterNet: House lawmakers passed legislation Friday to approve the Keystone XL oil pipeline to bring carbon-intensive tar sands oil from Alberta, Canada, to the Texas Gulf Coast. The Senate is expected to vote this week on a similar pro-Keystone bill backed by Louisiana Democratic Sen. Mary Landrieu. Landrieu is facing a tough battle to keep her seat in a runoff next month against Republican Rep. Bill Cassidy, who also happens to be the sponsor of the pro-Keystone bill in the House. Landrieu spoke last week...