OSLO (Reuters) - A dimming of the sun to match conditions in the "Little Ice Age" of the 17th century would only slightly slow global warming, a study indicated on Wednesday. A chimney billows smoke as the sun shines through haze on a cold winter's day in Beijing in this December 24, 2009 file photo. (REUTERS/David Gray/Files) A weakening of solar activity in recent years, linked to fewer sunspots, would cut at most 0.3 degree Celsius (0.5 F) from a...
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