cells

The rebuilt New York World Trade Center will be powered cleanly by four UTC Power hydrogen fuel cells and other sources of renewable energy such as offsite wind turbines.

Hydrogen fuel cells have been around for decades in NASA spacecraft and cars, but recently they are hitting the small electronics market and the prices are getting far cheaper.

Nanosolar with the help of the Google Guys has developed cheap solar panels that don't use silicon and are now bringing them to market. You can even buy one on eBay.

A solar taxi is traveling the world to call attention to global warming and offer solutions. By the time the trip is over the solar-hybrid vehicle will have traveled to 50 countries and 5 continents.