Several studies have shown an increase in atmospheric carbon dioxide. these increased levels play a direct effect on biogeochemical cycles. in the water cycle, with increased co2 levels, plants decrease their rate of thereby holding onto the reactants of photosynthesis. because plants hold onto these reactants, increases because plants don't take up the water. a) transpiration, runoff b) precipitation, runoff c) transpiration, precipitation d) precipitation, transpiration

A) transpiration, runoff

Explanation:

Vegetable perspiration is a process that occurs when the plant absorbs excess water. Excess water passes through the root region toward the leaves until it is passed into the atmosphere. The excess water of these vegetables is released by the leaves to the environment through small droplets of water that turn into steam. When the CO2 content in the atmosphere is excessive, plants decrease their transpiration rate so that they can maintain photosynthesis reagents. As plants retain these reagents, runoff increases because plants do not absorb water so that they do not perspire.

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