Earth/Environment
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USGS includes fracking triggered tremors to assess earthquake hazards
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Corn yields could fall victim to climate change
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Tree rings tell history of extreme droughts in Western U.S.
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Carbon dioxide, cause of global warming, hits record high level in atmosphere since existence of mankind
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Ocean acidity eating through shells of sea snails, warns NOAA
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Garbage beats humans to the deep seas. Bottles, plastic bags are everywhere, says survey
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Mount St. Helens is not about to erupt despite rise of magma levels
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List of U.S. cities with worst air pollution released: Is your city poisoning you?
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Deep-sea viruses ambush bacteria along hydrothermal vents for faster reproduction
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Carbon dioxide in Earth's atmosphere at highest level in 800,000 years
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Pacific tuna detected with traces of Fukushima radiation leak: Time to panic?
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Sinking coastal cities, more immediate problem than rising sea levels: Study
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