Email to a Friend
You could win $20,000 to put it into action. Take part in the Green Effect, a new initiative from SunChips and National Geographic to inspire people to take small steps for big change.
Sunday, July 5, 2009 |
Photo: Mars Melt Hints at Solar, Not Human, Cause for Warming, Scientist SaysAccording to one scientist's controversial take, the simultaneous rise in temperatures on Earth and Mars indicates a natural—and not a human—cause for global warming. But the vast majority of experts maintain that humans are responsible for Earth's climate changes and that the Mars phenomenon is mere coincidence. Photograph courtesy NASA
|
ADVERTISEMENTNATIONAL GEOGRAPHIC'S PHOTO OF THE DAYWhat's Your Green Idea?
|
|
ADVERTISEMENT
|