350.org has officially launched, in eight languages. Grassroots actions are now being planned around the world, from the Great Wall of China to the Eiffel Tower.

Here’s a fantastic video:

For more on 350, see:

• Bill McKibben on the need for 350ppm as a global target
• Bill McKibben on the kick-off of 350.org
• Me on the release of James Hansen’s seminal 350 paper
• Joe Romm on the release of Hansen’s paper
• Hansen’s paper (PDF)