Much of the radiation energy that makes it through is reflected back into space by clouds, ice and snow and the energy that remains helps to drive the Earth system, powering a remarkable planetary engine – the climate. It becomes the energy that feeds swirling wind and ocean currents as cold air and surface waters move toward the equator and warm air and water moves toward the poles – all in an attempt to equalize temperatures around the world.
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Scoop.it!
What has been billed as the largest sunspot observed in several years has now rotated around to stare straight at Earth. How large is it? 
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Scoop.it!
Carbon dioxide emissions from the burning of coal, oil, and gas have been increasing over the past decades, causing Earth to get hotter and hotter. There are concerns that a continuation of these trends could have catastrophic effects, including crop failures in the heat-stressed tropics. This has led some to explore drastic ideas for combating global warming, including the idea of trying to counteract it by reflecting sunlight away from Earth. However, it has been suggested that reflecting sunlight away from Earth might itself threaten the food supply of billions of people.
's comment September 4, 2012 1:19 PM
SUNSHADE ENGINEERING IS CRIMINAL - THIS IS A MISGUIDED ATTEMPT BY IDIOTS AND CRIMINALS WHO THINK THEY CAN DUMP TONS OF POISONS INTO OUR AIR WITH LITTLE REGARD TO THE ENVIRONMENTAL IMPACTS. SUNSHADE ENGINEERING IS CRIMINAL
http://www.youtube.com/watch?v=mEfJO0-cTis
Scoop.it!
Nuclear fusion drives the stars, including our sun. But on Earth, despite efforts dating to the 1940s, sustained and controlled fusion for electrical power production has never been realized.
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