You may qualify for energy incentives

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DSIRE is a comprehensive source of information on state, local, utility, and federal incentives that promote renewable energy and energy efficiency.

Click on your state to search the database.

See BusinessWeek Online for a slide show and reports on green technologies:

Bore a hole into the ground to draw the earth's warmth to heat and cool your home. Or why not put up a wind turbine or install solar panels to heat the water in your shower? Here are some green technologies being used in American and British houses that both draw on designs from the past and offer a glimpse of the future of home energy.

• Residential green goes glam