In 1986, the solar panels that President Jimmy Carter had installed at the White House were ordered to be removed by then-President Ronald Reagan. Carter, added the panels in 1979 due to the energy "crisis" created by the Arab oil embargo.
Fast forward to 2010--President Barack Obama pledges that the White House new solar panels are will be installed. They finally made their appearance in August.
To learn more about solar energy, look for Solar Energy: Saved by the Sun [DVD 333.7923 SAV], a Nova documentary produced by WGBH in Boston. We also have books on the subject, look in the 621.47 section.