Electricity | featured news

14-year-old William Kamkwamba dreamed of powering his village with the only resource freely available to him -- wind. His native Malawi had gone through one of its worst droughts seven years ago, killing thousands, when he thought of building a windmill to generate electricity and pump much-needed water.

China is investing heavily in electric-vehicle technology and offering subsidies to taxis and government agencies.

Lights were going out across the world on Saturday as millions of homes and businesses in major cities went dark for one hour in a symbolic gesture to highlight concerns over climate change.