Ask YC: Can social networks help with global problems

We've put up 4 sites, http://www.helpworldclimate.com is one of them, that are twitter-like but focused on creating communities around these issues. Why these four? Because these are the core ones, and if we worked on these, they would have an impact on health, education, and so on.

They link in to other networks, too, so if anyone is interested in helping with opening up the 'social graph', please get in touch.