Презентация на тему : Загрязнение воды.
Вложение | Размер |
---|---|
![]() | 2.96 МБ |
Слайд 1
Ecology. Water pollution. Авторы : Якушина Мария 8а Маджидова Зарина 8а Блинова Татьяна 8аСлайд 2
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.
Слайд 3
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.
Слайд 4
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 !
Слайд 5
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 .
Слайд 6
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
Слайд 7
. . Heavy metals, such as, mercury, selenium, uranium, radium, cesium, etc. They are very danjerous for life
Слайд 8
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.
Слайд 9
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.
Слайд 13
T he future of our planet is in our hands !
Рисуем "Ночь в лесу"
Сила слова
Пчёлы и муха
Астрономический календарь. Декабрь, 2018
Зимняя ночь. Как нарисовать зимний пейзаж гуашью