Thomas "Tom" Steyer, founder of Farallon Capital Management LLC, sits for a photograph after a Bloomberg Television interview in Pescadero, California, U.S., on Wednesday, Dec. 4, 2013. Keystone XL will be a "major driver" of oil sands expansion that significantly raises the risks of climate change, said Steyer, a former hedge fund manager who has spent some of his fortune fighting the pipeline. Photographer: David Paul Morris/Bloomberg via Getty Images
