Improve sea level and drought caused by globalwarm may result in more people to move.
全球变暖能提高海平面和干旱，会导致更多的人进行迁移。
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Global warming is slowing down the ocean current that carries warm waters from the tropics to the North Atlantic, scientists say.
科学家宣称，全球变暖让从热带流向北大西洋的海洋暖流减慢。
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Current global warming from greenhouse gases generated by human activities could warm the arctic to levels above the melting point of ice, the study said.