A visitor operates a cellphone linked to a solar-powered charger at the International Photovoltaic Forum and Exhibition in Taipei's World Trade Centre on October 7, 2009. A total of 230 companies will display their latest lines of products during the three-day event. Getty Images logo Getty Images 1 month ago

A visitor operates a cellphone linked to a solar-powered charger at the International Photovoltaic Forum and Exhibition in Taipei's World Trade Centre on October 7, 2009. A total of 230 companies will display their latest lines of products during the three-day event.