350 is the number that leading scientists say is the safe upper limit for carbon dioxide—measured in "Parts Per Million" in our atmosphere. 350 PPM—it's the number humanity needs to get back to as soon as possible to avoid runaway climate change.
Learn more about what people of faith can do here.
This is taken from the the 350 International Day of Climate Action
So here’s the plan. On October 24, we need you to organize an action in the place where you live, something that will make that most important number visible to everyone. People in more than 1000 communities around the globe have already announced plans—they’ll be school children planting 350 trees in Bangledesh, scientists hanging banners saying 350 on the statues on Easter Island, 350 scuba divers diving underwater at the Great Barrier Reef, and a thousand more creative actions like these. At each event, people will gather for a big group photo that somehow depicts 350--and upload that photo to the web 350.org. As actions take place around the world, we'll link all the pictures together electronically via the web--by the end of the day, we'll have a powerful visual petition linking together the entire planet that we can deliver to the media and world leaders.
So far more than 100 nations are taking part—it's shaping up to be to be the biggest day of grassroots action on global warming ever. But we need it to be much larger—we need you, in your village or town or city, to take part. It’s not hard—we can help you with materials and ideas. But you need to take the first step, by registering an action and starting to let your friends and neighbors know about it.