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These futuristic projects promise to make the world greener, while making entrepreneurs some green.
1. Home Hydrogen Fueling Station
1. Home Hydrogen Fueling Station
What could be greener than a hydrogen car in your driveway? Try a solar-powered hydrogen fueling station in your garage. Australian scientists have developed a prototype of such a device. It's about the size of a filing cabinet and runs on electricity generated by rooftop solar panels. The first version is expected to produce enough hydrogen to give your runabout a range of some 100 miles without emitting a molecule of planet-warming greenhouse gas. Road trips are out of the question, but it's enough juice for running errands or powering fleets of delivery trucks. Tests of the home fueling system began early this year with commercial trials two years off. (See the full story.)

Hydrogen Fuel Station

Environmental Sensors

Toxin-Eating Trees

Nuclear Waste Neutralizer

Ocean Robots

Sonic Water Purifier

Endangered-
Species Tracker

Renewable Smart Power Grid
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