350 Davis: Climate Action Day Bike Parade and Celebration, October 24th, 2009
350.org is an international campaign dedicated to building a movement to unite the world around solutions to the climate crisis. The campain's focus is on the number 350--as in parts per million, the level scientists have identified as the safe upper limit for CO2 in our atmosphere. Accelerating arctic warming and other early climate impacts have led scientists to conclude that we are already above the safe zone at our current 390ppm, and that unless we are able to rapidly return to 350 ppm this century, we risk reaching tipping points and irreversible impacts.
Photography by Samer Alassaad