The major system of the Earth that is made up all the living organisms found on the Earth is the . *

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.

and after water is usually warmed by the sun the water temperature raises and then evaporates .

not always but somethings can be reproduced in a laboratory.