Wednesday, February 10, 2010

Solar power

Solar energy is gradually emerging as a major energy source. But solar-powered devices — including calculators — have been around for decades, and you don't need any new technology to get heat from a sunny window or to dry your laundry in the sun.

Do you have any solar-powered devices? How do you already use the energy of the sun in your everyday life?

This week's theme is the sun.