Environment

• 5.0-magnitude earthquake occurs in Andaman Sea

• Urumqi top of polluted cities list

• Black rhino killed by poachers in Kenya sanctuary

• Eight lions, 25 elephants killed outside Tanzania sanctuary

• Dinosaurs in decline long before asteroid impact: study

• Ecuador earthquake death toll soars to 413: gov't

• Xinjiang city tops China's Q1 smog list

• Pollution poses threat to cities' water

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  Exotic species add pressure at border

• Rainstorm kills 6 in central China

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