TASK(5) WATER POLLUTION

     Water pollution is one of the most serious environmental problems. It occurs when water is contaminated by such substances as human and animal wastes, toxic industrial chemicals, agricultural residues, oil and heat. Most of our water bodies like rivers, lakes, seas, oceans, estuaries and underground water sources are gradually becoming polluted. Polluted water may look clean or dirty, but it invariably contains germs, chemicals or other materials that can cause inconvenience, illness or death. Water pollution is very dangerous to our health therefore, we should not pollute our water and start taking action.

TOPIC SENTENCE

Water pollution is one of the most serious environmental problems.

SUPPORTING SENTENCE

It occurs when water is contaminated by such substances as human and animal wastes, toxic industrial chemicals, agricultural residues, oil and heat. Most of our water bodies like rivers, lakes, seas, oceans, estuaries and underground water sources are gradually becoming polluted. Polluted water may look clean or dirty, but it invariably contains germs, chemicals or other materials that can cause inconvenience, illness or death.

CONCLUDING SENTENCE

Water pollution is very dangerous to our health therefore, we should not pollute our water and start taking action.