By Saheli Datta and Todd Woody, Business 2.0 Magazine

The planet’s most pressing environmental problems – global warming, energy shortages, over fishing, pollution – may seem just too big to be solved with today’s technology. But don’t despair: A lot of bright minds are working on futuristic projects that promise to make the world greener while making entrepreneurs some green. It’s save-the-world stuff like toxic-waste-eating trees, smart electricity grids, oceangoing robots, and floating environmental sensors. Then there’s the alternative-energy home fueling station that could jump-start the long-awaited hydrogen economy. This technology may seem far out – but it will probably be here a lot sooner than you think.  Read more...