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Common pollutants in the waters • Sewage • Oil • Industrial wastes • Plastics Common pollutants in the waters Sewage Common pollutants in the waters Sewage • Contains wastes from human beings and livestock • Encourages growth of algae and bacteria • Can cause red tides • May cause diseases in human beings Common pollutants in the waters Oil Common pollutants in the waters Oil • From accidental spillage or illegal dumping • Stops air from going into water • Marine life may die without enough air Common pollutants in the waters Industrial wastes Common pollutants in the waters Industrial wastes • Wastes chemicals discharged by factories • Poisonous and harmful to marine life Common pollutants in the waters Plastics Common pollutants in the waters Plastics • Plastic bags and other items dumped into the sea • Harmful to marine life • Fish cannot eat any food if plastics go into their bodies
