Much of the sun's radiation is reflected back into space by the earth's

Much of the sun's radiation is reflected back into space by the earth's atmosphere.

Earth’s average albedo is about 0.3. In other words, about 30 percent of incoming solar radiation is reflected back into space and 70 percent is absorbed. A sensor aboard NASA’s Terra satellite is now collecting detailed measurements of how much sunlight the earth’s surface reflects back up into the atmosphere.

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the backbone of the dna and rna compound is sugar phosphate.

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