Environment
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China plans tougher quality standards for coal to tackle pollution
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America's frogs and toads disappearing fast, study warns
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In China, food scares put Mao's self-sufficiency goal at risk
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Oklahoma tornado victims astounded at how they survived
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Showers to slow U.S. corn seedings from blistering pace
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Shell feared disaster days before Alaska rig grounding: official
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China says its legal ivory trade not to blame for poaching
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U.S. pesticide makers seek answers as bee losses sting agriculture
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Drop in U.S. underground water levels has accelerated: USGS
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CP Railway reopens line, cleans up after oil spill
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