All around the world today people are coming together to call for international action against climate change. The focus has been on the number 350, which is the parts-per-million of carbon dioxide in the atmosphere that scientists, including the UN's top climate scientist Rajendra Pachauri, believe we need to stay below in order to avert disaster. 350.org has organized a series of events around the world calling attention to the target, and they're giving visitors and participants alike some real time gratification through Twitter feeds and Flickr slideshows. We've blogged about Maldivian officials holding a cabinet meeting underwater to raise awareness of rising oceans, and now the Divers Association of the Maldives is hosting an underwater rally with the goal of having 350 divers stay underwater in teams for 24 hours. You can find out what's going on near you at 350.org.

At Link TV we've been exploring how climate change is already having an impact in the US and elsewhere through a series of short videos called Climate Change Hits Home.