Europe's Shift to Dark Green Forests Stokes Global Warming, Study Shows

An expansion of Europe's forests toward dark green conifers has stoked global warming, according to a study Thursday at odds with a widespread view that planting more trees helps human efforts to slow rising temperatures. Forest changes have nudged Europe's summer temperatures up by 0.12 degree Celsius (0.2 Fahrenheit) since 1750, largely because many nations have planted conifers such as pines and spruce whose dark color traps the sun's heat, the scientists...

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