U.S. report on Keystone indicates little climate impact

A long-awaited State Department environmental report on the proposed Keystone XL oil pipeline indicates what the oil industry and its backers have been saying -- it won't have a big impact on carbon emissions that cause climate change.
The report released Friday appears to give the Obama administration the cover it needs to approve the politically charged project, but not until May at the earliest, after a 90-day review and comment period.