Nitrogen - 14 and nitrogen - 15 are isotopes of the same element. How do these isotopes differ

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.

b. the carbon cycle ensures living things have a source of hydrogen