Earth Hour to Darken the Globe Tonight

  Earth Hour is tonight from 8:30-9:30 pm, a time when people and institutions all over the world will turn out their lights to raise awareness of climate change and the need for renewable energy sources. From individuals to the Eiffel Tower, this event that started in Australia in 2007 has spread the world over and will include hundreds of millions of people.  Learn more in this story by Aljazeera, and consider joining in by spending your evening in candlelight.