Water cycle means the change of water circulation, which is a worldwide phenomenon, เองตามธรรมชาติ By starting from the water, such as ocean sea, river, canal Nong, swamps, lakes from transpiration of plantsAnd from the various activities used in human daily life up in the atmosphere, affect evaporation cooling water mist condensation is a small cloud Fall as rain or hail to the ground flows into the water resources
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