Слайд 2
Water pollution occurs mainly when people overload the aquatic environment, streams, lakes,
underground waters, bays and seas, waste or substances harmful to living beings.
Слайд 3
Plants and animals need relatively pure water, and they will not survive
if there are toxic chemicals or harmful microorganisms in the water. Water pollution kills a large number of fish, birds and other animals.
Слайд 4
People who drink polluted water can get sick (cancer, infectious diseases, health
problems in future children).
Слайд 5*Have you asked yourself the question, do the wastes fall into the ocean?
It turns out 75 g dry weight in solid form per person per day fall into the ocean, and in the world live more than 6 billion people.