The preferred dating technique for obtaining a numerical age of an archaeological sample of charcoal is Radiometric dating, a technique used in estimating the absolute (numerical) age of geological materials such as rocks, minerals or organic matter, which is achieved from radioactive isotopes; which are based on the isotope decay series with constant rates of radioactive decay.
Answer:
Eutrophication.
Explanation:
This is the natural process of excessive enrichment of water with nutrients by which large amount of living organic matter grows in the water.lakes slowly develop large concentration of aquatic life, which eventually decays. Human activities have speeded up this natural process of eutrophication by adding mineral and organic nutrient in larger quantities.
Marijuana growers main reason in diverting water from creeks and wild rivers is due to drought. Like any farmer, marijuana growers needs water for the cultivation of this plants. This booming of industry marijuana cultivation has to lead to the greater demand for water which could not be sustained because of drought.