What is the worst form of marine pollution?

Answer 1

This is an immensely complex question because it depends on "for who?" For example, read the following paragraph (an earlier answer):

Smog. It can blind you, crash your car, cause respiratory problems, kill ozone, cause fumes in your car engine, make you late for work, and be quite a pain. Smoke and fog = smog.

For that person smog was the worst. For someone living next to a coal driven electric plant, that might be the worst. For each person there is a worst, depending on the person's circumstances. A crucial question is: what is the worst for mankind?? Another: what is the worst for the biosphere as a whole? Another: what is the worst for the planet?

The planet and biosphere can be considered as a pair, supporting each other, protecting each other. Pollution which damages the biosphere threatens both biosphere and planet. Examples would be global cooling, global warming, food chain destruction such as loss of a major pollinator, ozone layer damage, etc.

The seriousness would depend on the position in the biosphere where the hit occurred, the amount of biosphere attacked, and the duration of the attack. For example, a pollutant killing ocean krill by a very long-lived pollutant distributed over our major oceans could bring our entire biosphere down. Pollutants destroying major pollinators could likewise bring the biosphere down. The more resistant the pollutant is to biodegradation, the more trouble it bodes.

Perhaps we can say, the more there is of a pollutant the worse, the lower it targets the food chain, the worse, the wider its dissemination the worse, the longer its life the worse.

Answer 2

effects of oil in the oceans.