Preservatives such as citric acid are added to foods to interfere with bacterial growth. this creates an acidic ph in the food. why does this affect the bacteria that are present?

to add tartness

Explanation:

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.