The most famous residence in America, which has already boosted its green credentials by planting a garden, plans to install solar panels atop the White House's living quarters. The solar panels are to be installed by spring 2011, and will heat water for the first family and supply some electricity.

...Based on available roof space, administration officials expect the photovoltaic system will include between 25 to 75 panels and will convert sunlight into 19,700 kilowatt hours of electricity a year. That would save a typical household $2,300 on its electricity bill, based on commercial rates in Washington. The solar hot water heating system, based on government estimates, could save an additional $1,000 a year. (full story)