In another lazy man's blogpost, I'm reporting straight from 350's site:
350 is the most important number on the planet. This number is the safe line for
our global climate and a start line for a global movement. Join 350.org to
take action in your community, engage our world leaders, and build an
international movement to solve the climate crisis.
Check out their site to learn more, and let me know how you can involve GMC.