There is no longer any doubt that global warming is underway, but the situation is not hopeless. The good news is that scientists have proposed a way to avoid the worst outcomes: phase out coal. In fact, James Hansen, director of NASA's Goddard Space Institute, has said that ending emissions from coal "is 80% of the solution to the global warming crisis." Fortunately, economical alternatives to coal are now at hand, and around the world, over 400 citizen groups are working to promote a transition away from coal. The mission of CoalSwarm is to assist this movement by building a constantly expanding body of information that everyone in the movement can use and add to.