350.org is the first large-scale grassroots global campaign against climate change. Its supporters include leading scientists, the governments of 92 countries, and a huge variety of environmental, health, development and religious NGOs. AllGo to 350.org for more info.
agree that current atmospheric levels of CO2 -- 390 parts per million -- are causing damage to the planet and to its most vulnerable people, and that government action at the United Nations Copenhagen climate conference is required to bring the earth's carbon level swiftly down to 350 ppm.
What is 350? 350 is the number that leading scientists say is the safe upper limit for carbon dioxide in our atmosphere. Scientists measure carbon dioxide in "parts per million" (ppm), so 350 ppm is the number humanity needs to get below as soon as possible to avoid runaway climate change. To get there, we need a different kind of PPM -- a "people powered movement" that is made of of people like you in every corner of the planet.