social networking for social cause

http://www.carbonrally.com/ is a one amazing site which i just happened to bump into .....while various diffrent environmental organisation are busy creating awareness on environmental issue, corporates are busy adorning their papers and speeches with the word 'go green'.... http://www.carbonrally.com/ is one site gathering people from various walks of life to compete on carbon reduction challenges.... they have various challenges which groups and individuals can take to reduce their respective carbon footprint. it also gives a number of tips be green and reduce carbon emmision Corporates can learn a lot from this site. They can organise more amnd more such competition and encourage various departments and employees to compete... i'm sure this will bring down their carbon footprint immensely.