 What do we want? Climate justice! When do we want it? Now! McKibben has written some 20 books, including The End of Nature in 1989, which sounded the alarm about climate change. With seven Middlebury students, he founded 350.org, a global grassroots climate campaign that has organized demonstrations around the world, like this one in 2011, when thousands of people surrounded the White House to oppose the Keystone XL pipeline.