The theories on the origin of the universe may change because of new investigations

will become laws if they do not change

cannot change because of new discoveries

will weaken scientific knowledge if they change

what's the question ?

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.