Why does the tower of Pisa (Italy) not fall despite being tilted? Support and draw your answer. HELP ME :(

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.

(nitrogen fixation) will be your answer sorry if im wrong