On March 27, people and businesses around the world will turn off their lights for one hour starting at 8:30 p.m. local time as part of the fourth annual
Earth Hour, which was created to encourage people to become more aware of what they can do to help the environment.
Earth Hour, organized by World Wildlife Fund, was launched in 2007 in Sydney, Australia, as a stand against climate change. By March 2009, the event had grown to involve hundreds ...