Vitamins taken in megadoses can be harmful because they

they  are harmful to the amuse system of your body

Explanation:

don't trip.

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.

i think the miocene epoch spans the time from 23 million to 12 million years ago.