Houston Chronicle: President Barack Obama on Tuesday put climate change at the center of the heated debate over the Keystone XL pipeline by insisting in a major policy speech that the project's fate hinges on how much carbon dioxide it contributes to the atmosphere.
"The net effects of the pipeline's impact on our climate will be absolutely critical in determining whether this project will be allowed to go forward," Obama said as he unveiled a broad plan for combatting global warming.
Obama vowed that his administration...