A small part
of the big circle of hope that surrounded the White House today. We're all so hopeful that President Obama will help lead the way

The Science of 350
Scientists say that 350 parts per million CO2 in the atmosphere is the safe limit for humanity. Learn more about 350 – what it means, where it came from, and how to get there. Read More »
Featured Movement Updates
Tell world leaders to go solar!
As you all know, we're getting to work on 10/10/10--all around the world people are preparing climate solutions projects for their communities, their mosques and churches and synagogues and temples, their schools and homes. We thought our leaders should have a chance to get personally involved too, which is why we're today launching a special campaign aimed just at them. Read Post »
Circle This Date.
It's been an incredible few months of non-stop campaigning here at 350.org--and we're about to kick it into high gear. Starting today, we're pulling out all the stops and charging towards 10/10/10, the "Global Work Party." This one day will be a MASSIVE opportunity to celebrate climate solutions at the local level--and put the pressure on our leaders while doing so. If you don't already know all about 10/10/10, read the NEW invitation letter from 350.org co-founder Bill McKibben. Read Post »
My favorite photo.
On the morning of October 24, 2009, as people rallied in thousands of cities across the planet, a young woman named Ola walked alone to the center of Babylon, Iraq, took a deep breath, and unfurled a 350 banner, joining a worldwide call for climate action... Read Post »
Submit and View Photos
To submit your photos and action reports to 350.org, please click here.
To check out our ever-expanding pool of photos, visit www.350.org/photos
Understanding 350 - Frequently Asked Questions
- So, what is global warming and what's the problem anyway?
- And what does this 350 number even mean?
- If we're already past 350, are we all doomed?
- How do we create the political change to steer towards 350?
- How do we actually reduce carbon emissions to get to 350??
- Will this thing work? Will world leaders listen?
- Where did this 350 number come from?
- Isn't America the biggest source of the problem? What about China and India?
- 350 is just a number. Wouldn't "Climate Emergency" or "Clean Energy Now" be a better call to action?
- And what about all the other targets people are aiming for?
- Why another organization--there are already too many things going on!
- Do you measure 350 in CO2 or CO2e?
More...
Donate to 350.org
Support an international movement to solve the climate crisis. Whether 3.50, 35.00, or 350.00, euros, dollars, or pesos, your contribution helps us keep going.
350 Store
Help spread the word and look good while doing it—check out the 350 Store for t-shirts, buttons, stickers, and more.
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