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Impact Humidity Transpiration Rate  Vapour Diffusion Humid Air 

Higher humidity around a leaf reduces the rate of transpiration because there is less water vapor diffusion into the surrounding air.

Higher humidity around a leaf reduces the rate of transpiration because there is less water vapor diffusion into the surrounding air.

Front impact of humidity on transpiration rate 
Back less vapour diffusion into humid air 

Tags: 9_1_xylem_transport

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