big, but they aren't able to absorb waste endlessly. This is so big

problem today. People throw enormous quantity of home and industrial

sewage, oil, plastic and radioactive waste. They damage marine animals

and plants. But they are dangerous for human too.

People throw radioactive wastes. Firstly they put the wastes in cement, but it'll destroy one day.

We throw one million tones of plastic packet, glass bottles, tins, metal

barrels, wood, old nets, ropes. Mammals and marina birds entangled by

this rubbish and they die.

To save water we should use water economically, try to recycle different rubbish.