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Some people have speculated that, just like changing from a black T-shirt to a white T-shirt can help keep you cool in the summer sunshine, making our planet more reflective to sunlight might help counteract global warming. To the list of ethical, legal, political, and environmental obstacles such proposals face, NOAA and NASA scientists recently pinpointed a scientific one: the limits to our ability to detect that kind of change. [Source: NOAA Climate.gov]
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