Gap Fill - Cold Air - Level 5

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   air      effect      humid      lightness      pressure      research      same      thunderstorms      warming      whether  

Paragraph 2

Scientists say air is lighter than dry at the temperature and . This is called the vapour buoyancy effect. Cooler air containing water droplets rises to form clouds and . Rain has a cooling effect in tropical areas. More is needed to find out the effects rising cool air has on limiting global . A researcher said: "Now that we understand how the of water regulates tropical climate, we plan to study global climate models accurately represent this ."

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