Human activity has led to the pollution of oceans.
1. Throwing of several million tonnes of plastic wastes every year leading to choking of marine life. Fish seabirds, sea turtles, marine mammals not only get entangled in plastic, but plastic debris causes suffocation and starvation of marine life.
2. Excessive fishing i.e. overfishing has led to decline in marine life, (m) Chemicals, fertilisers etc used’ in industries and agriculture plus trash are washed, blown or intentionally dumped into oceAnswer:
3. Warning : Greenhouse gases in the atmosphere trap energy from the sun. The oceans absorb much of this energy, causing ocean waters to warm whereby there is less available dissolved oxygen for native sea life which negatively impacts the biological process.