3.38 min. | 5.0 user rating
Some homeowners are installing wind turbines in their backyards. These windmills are connected to the grid, and deliver renewable, green energy to the owner's home. MarketWatch's Stacey Delo talks with San Francisco homeowner Robin Wilson about putting in a wind turbine in an urban area. Video originally aired October 8, 2008. Check out more videos at www.wsj.com

0.35 min. | 4.9663863 user rating
We're developing an innovation called Searaser -- which we believe could solve two of the biggest challenges facing renewable energy -- cost and variable output. Invented by Devon engineer Alvin Smith, Searaser harnesses the almost constant power of ocean swells to create electricity on demand. It's such a simple design and we believe it'll produce electricity cheaper than any other wave-power technology, or indeed any other type of renewable energy. Potentially it could be cheaper than all existing sources of electricity -- including gas, coal and nuclear -- and it's carbon free.

1.78 min. | 4.8333335 user rating
Design of offshore renewable power station consists of wheel units arranged in array perpendicularly with travelling wave / wind paths thus the lower array of floating submersed wheels absorbs passing wave energy and acts as brake water as well while the upper free to air array of wheels absorbs the passing wind energy.