This one policy makes it much easier to pay for a solar or wind-electric system, but not every state offers it.

Daniel Sheridan found a way to turn children's energy into electrical power with a see-saw that generates electricity. The see-saw should generate enough electricity to light a classroom for a whole evening after only five to 10 minutes of use.

After a five month struggle, the San Francisco board of supervisors approved a program called GoSolarSF, making solar installations more affordable for its citizens.

Massachusetts Institute of Technology has developed a way to double electricity from solar cells by using dyed glass.

If you want to learn more about renewable energy, green building and other sustainable living topics, the Solar Living Institute (SLI) in Hopland, Calif., is a great resource. The Institute offers hands-on workshops to help participants learn sustainable living skills such as brewing biodiesel, making natural plasters, building with straw bales and much more. Every summer, the Institute also holds an annual festival called SolFest, which features workshops, speakers, music and food.

Al Gore is calling on Americans to support a rapid transition to renewable energy. Tell us what you think.

A new city being built in the Middle East could become the model for the world's move to renewable resources. Could the U.S. be next in line for a carbon-free metropolis?

It's surprisingly easy to figure out how many carbon dioxide emissions come from producing the electricity for your home, or burning a full tank of gas. Check out this carbon calculator, or find out how to do a quick ballpark estimate.

Heating water with the sun is no longer an option on the Hawaiian islands. A bill was passed in Hawaii that requires all new homes to install a solar water heater in order to receive a building permit.