Pollution - скачать презентацию

Нажмите для полного просмотра!

Содержание ▲

Вы можете ознакомиться и скачать Pollution . Презентация содержит 32 слайдов. Презентации для любого класса можно скачать бесплатно. Если материал и наш сайт презентаций Вам понравились – поделитесь им с друзьями с помощью социальных кнопок и добавьте в закладки в своем браузере.

Слайды и текст этой презентации

Слайд 1

Описание слайда:

Pollution

Слайд 2

Описание слайда:

About 150 years ago the air was pure and clean.

Слайд 3

Описание слайда:

Then people started building factories and many of the things they make, like cars, put a lot of harmful gases into the air.

Слайд 4

Описание слайда:

Today the air is so polluted in some places that it’s not always safe to breathe there.

Слайд 5

Описание слайда:

Many cities around the world have air polluted with “smog”. This is so strong in some places that the air, which should be a beautiful blue, looks brown.

Слайд 6

Описание слайда:

The planet Earth is mostly water. Oceans cover the biggest part of it – and there are lakes, rivers, streams and even water underground. All life on the Earth – from the smallest bug to the biggest whale – depends on the water. It’s precious.

Слайд 7

Описание слайда:

But we are not doing a very good job of keeping water clean. In many places, the water has become polluted.

Слайд 8

Описание слайда:

Rivers and lakes are polluted by garbage or by poisonous chemicals which are dumped right into them.

Слайд 9

Описание слайда:

Underground water can be polluted by gasoline or by harmful liquids that seep into the ground. Some fertilizers and pesticides used in farming leak down through the dirt, too.

Слайд 10

Описание слайда:

When you throw something away, it goes in a garbage can.

Слайд 11

Описание слайда:

Once a week a garbage truck comes and the can is emptied, and that’s the last you see of it. But what do you think happens to the garbage then? Does it just disappear? No way!

Слайд 12

Описание слайда:

Now we are making so much garbage that in many places, there is not enough room to bury it all.

Слайд 13

Описание слайда:

We have to act fast and cut down the amount of garbage we make. Can we do it? You bet!

Слайд 14

Описание слайда:

We can recycle (which means re – using materials instead of throwing them away) and reject (which means not buying things that can’t be re – used, like plastic wrapping and other packaging).