The anti-Keystone email campaign gathered more than 800,000 messages to Senate leadership. Check out this picture of the messages being delivered.

Internal documents from Heartland Institute, the climate-denying think tank, show funding from sources like Microsoft, Koch Industries (which had reportedly stopped funding the institute), tobacco companies, and other corporations. One “Anonymous Donor” gave more than $1.6 million in 2010 and $979,000 in 2011.

The White House said senior advisers would recommend the president veto the House version of the transportation bill, citing provisions to open the Arctic National Wildlife Refuge and to approve the Keystone XL pipeline.

Maybe Republicans didn’t hear that after its completion, the pipeline could create as few as 20 permanent jobs.

A Texas farmer won a temporary restraining order against TransCanada, which has been using eminent domain to start work on the pipeline corridor.

Exposure to air pollution can increase the near-term risk of a heart attack.

In China, electric vehicles may actually make pollution worse, since the electricity comes from coal-fired plants.