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| Before-and-after images effective in Earth Hour 2009 |
| Tuesday, March 31, 2009 | by Mike Sturk |
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The Big Picture from The Boston Globe has an interesting collection of images from around the world on Earth Hour 2009 held at 8:30 pm local time on March 28. The event is meant to raise awareness on the effects of greenhouse gas emissions. Starting with the second image, click on it to see the effect of the lights being turned off.
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