Precipitation - The falling of water to the ground (rain, snow, hail, sleet), Condensation - The process that leads to the formation of clouds. Water changes from vapour to liquid due to this process. , Evaporation - The process of water changing from liquid to vapour., Transpiration - The process of water on trees and plants changing from liquid to vapour. , Deforestation - The loss of forests around the world., Oxygen - What trees give out, Infiltration - The process of water passing through the ground. , Run Off - The movement of water along, or under the ground. ,

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