What are the techniques available for reconstructing the past? how do archaeologists determine when human activities occurred? what is the difference between absolute dating and relative dating? what are some examples of each?

atp is used for energy.

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.