Climate
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		ClimateReaders question dark fusion, Antarctic ice melting and more
Readers had questions about Antarctic ice melting, dark fusion and greenhouse gas emissions.
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		EarthGlobal dimming may mitigate warming, but could hurt crop yields
Injecting a veil of tiny particles into the atmosphere might reduce global warming, but it could also lower crop yields.
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		EarthYou’re living in a new geologic age. It’s called the Meghalayan
The newly defined Meghalayan Age began at the same time as a global, climate-driven event that led to human upheavals.
By Beth Geiger - 			
			
		OceansShallow reef species may not find refuge in deeper water habitats
Coral reefs in deep-water ecosystems may not make good homes for species from damaged shallow reefs.
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		EnvironmentWildfires are making extreme air pollution even worse in the northwest U.S.
America’s air is getting cleaner — except in places that are prone to wildfires.
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		ClimateBloodflowers’ risk to monarchs could multiply as climate changes
High atmospheric carbon dioxide levels can weaken the medicinal value of a milkweed that caterpillars eat, and high temperatures may make the plant toxic.
By Susan Milius - 			
			
		EarthEarth’s rivers cover 44 percent more land than we thought
A global survey of rivers and streams based on satellite data suggests that these waterways traverse about 773,000 square kilometers.
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		ClimateWhy won’t this debate about an ancient cold snap die?
Critics are still unconvinced that a comet caused a mysterious cold snap 12,800 years ago.
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		ClimateAntarctica has lost about 3 trillion metric tons of ice since 1992
Antarctica’s rate of ice loss has sped up since 1992 — mostly in the last five years, raising global sea level by almost 8 millimeters on average.
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		ClimateTropical cyclones have slowed over the last 70 years
Tropical cyclones are moving 10 percent slower, on average, than they did in the mid-20th century, potentially making them more dangerous.
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		EnvironmentA big analysis of environmental data strengthens the case for plant-based diets
A new study calculates the bonus for the planet of choosing more foods from plants.
By Susan Milius - 			
			
		ClimateThe first Americans could have taken a coastal route into the New World
Alaskan glaciers retreated in time for ancient coastal entries of the first Americans.
By Bruce Bower