Nearly 4,000 events are planned in more than 160 countries for the International Day of Climate Action on 24 October 2009 — the most widespread day of political action in history.
It’s a call to action by the 350.org campaign: “On 24 October, we will stand together as one planet and call for a fair global climate treaty. United by a common call to action, we’ll make it clear: the world needs an international plan that meets the latest science and gets us back to safety.”
This is their viral video. More at: http://www.350.org