The largest climate rally in U.S. history Bottom-lined by 350.org, the D.C. anti-Keystone XL and climate demo drew up to 50,000, but remained subdued By Natasha Lennard Published February 18, 2013 6:23PM (EST) (Zachary A. Bell) Facebook X Reddit Email Save Advertisement: By Natasha Lennard By MORE FROM Related Topics ------------------------------------------ Slideshow Related Articles Advertisement: Advertisement: