Which process occurs when bacteria converts nitrogen gas to a usable form? decomposition
condensation
fixation
transpiration

C. fixation

Explanation:

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the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.