Most of the Earth’s surface is covered with ocean.

True

False

1. dermis

2. chemical

3. urine

4. viruses

5. antibodies

when it is at an intermediate population density

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.