Scientist are now saying that we can artificially cool the Earth. In theory - reflecting a small amount of sunlight back into space before it strikes the Earth's surface would have an immediate and dramatic effect. Scientists are saying this could work but the downfall would be it would take some time to figure out how exactly to make it happen. Time is something we do not have anymore.
In the United States, a group of 18 U.S. experts from the sciences, social sciences and national security made a report urging the federal government to begin research on the potential effectiveness of geoengineering.
http://www.dailymail.co.uk/sciencetech/article-2069449/Could-scientists-reverse-global-warming-The-U-N-discusses-plans-reflect-sun-cool-earth.html
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