GEOLOGY

Detailed explanation-1: -Human activities on land are the biggest sources of marine pollution-an estimated 8 million tonnes of plastic waste enter the world’s oceans each year. These include solid waste dumped along coastlines, scattered litter on beaches, and pieces of broken down ships.

Detailed explanation-2: -The majority of pollutants that make their way into the ocean come from human activities along the coastlines and far inland. One of the biggest sources of pollution is nonpoint source pollution, which occurs as a result of runoff.

Detailed explanation-3: -Most ocean pollution begins on land. Eighty percent of pollution to the marine environment comes from the land. One of the biggest sources is called nonpoint source pollution, which occurs as a result of runoff.

Detailed explanation-4: -Most of the plastic in our oceans comes from land-based sources: by weight, 70% to 80% is plastic that is transported from land to the sea via rivers or coastlines. The other 20% to 30% comes from marine sources such as fishing nets, lines, ropes, and abandoned vessels.

Detailed explanation-5: -Which is the most input of waste causing marine pollution? Explanation: The most obvious input of waste for marine pollution is through pipes directly discharging waste into the sea. Very often, municipal waste and sewage waste from residences and industries in coastal towns are directly discharged into the sea.