Загрязнение воды

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Many years ago. Many years ago very good relations was between people and nature. Sky was blue, air and water were clean and fresh and people were happy and healthy.

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Nowadays. But nowadays people began built many factories and plants. We build factories on the river banks and pour toxic waste into it. In short, we turn our rivers, lakes and seas into dumps.

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Take a look! L et's talk about water pollution . Take a look ! Animals, fishes and birds dying, we have not clean water to drink and our children have not good health. W e are guilty in all that !

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Dirty water Water pollution occurs mostly, when people overload( перегружают) the water environment such as streams, lakes, underground water, bays or seas with wastes or substances harmful (вредными) to living beings .

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The major water pollutants are chemical, biological, and physical materials that lessen the water quality (качество) . Pollutants can be separated (разделены) into several different classes

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. . Heavy metals, such as, mercury, selenium, uranium, radium, cesium, etc. They are very danjerous for life

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Pacific island of trash . This island stay in Pacific Ocean between Alaska and California – millions tons of waste. It grow very quickl y. Every day people throw (сбрасывают) hundreds kilograms of trash in water.

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A quatic animals and birds problem. M ore than a million birds and 100 hundreds a quatic animals dying (умирают) every year. They think that trash is their food and eat it.

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T he future of our planet is in our hands !