Startup Idea : SMS donation for social organizations

There are lots of social organizations like unesco, save world and etc... which need money for their activites. I think most of people can afford 1-2 euro/usd per month to help planet, children and so on. And donation for this organizations must be as easy as possible. And I suggest integrating sms payment service for such organizations. We build web site, contact legally registered social organizations about their needs. We promote this with the help of social networks. Social organizations get their money. Once web site is built it costs nothing to run this project. So this project is only for volunteers. I will build web site. I need people who can promote it. Any other ideas regarding this project are welcome.