What Happens When We Don't Go GreenFrom numbers standpoint, the harm done to the planet is quite surprising.
Landmarks Locally, Worldwide Go Dark For 'Earth Hour'Go dark to go green -- that's what city buildings all around the world did for one hour Saturday.
Millions Expected To Take Part In "Earth Hour"Earth Hour is 8:30 to 9:30 Saturday night -- and there will be a number of local efforts.
PECO Building Powers Down Saturday Night In Honor Of 'Earth Hour'At 8:30 p.m. Saturday, many cities and towns around the globe will be observing Earth Hour. It was created by the World Wildlife Fund to raise awareness about climate change.