The roots of a plant suck water from the soil and combine it with mineral salts to absorb them more easily. The plant then eliminates the water by transpiration through its stomata, tiny openings on the undersides of its leaves. Each year, a forest transpires a quantity of water vapor equivalent to a layer of water 1.2 m thick covering its area.

The roots of a plant suck water from the soil and combine it with mineral salts to absorb them more easily. The plant then eliminates the water by transpiration through its stomata, tiny openings on the undersides of its leaves. Each year, a forest transpires a quantity of water vapor equivalent to a layer of water 1.2 m thick covering its area.

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