Acid rains

Содержание

1. Acid rains
2. acid rains
3. Слайд 3
4. Many nations of the
5. Слайд 5
6. THE EFFECTS OF ACID RAIN When acid
7. A substance called aluminum
8. The Effects of Acid Rain
9. Acid rain also damages various kinds of
10. Слайд 10
11. Слайд 11
12. The Extent of the Problem By
13. Слайд 13
14. This is because winds carry the pollution
15. Слайд 15
16. Despite much debate and discussion between many
17. Слайд 17
18. Скачать презентанцию

acid rains

Слайды и текст этой презентации

Слайд 1ACID RAINS
When coalWhen coal and petroleum are burned, they release

certain harmful gases into the air. These gases combine with

the oxygen and water in the air. When the water in the air comes down as rain, sleet, hail, or snow, it carries with it these gases. This is known as acid rain. Acid rain is very damaging to all life forms.

ACID RAINSWhen coalWhen coal and petroleum are burned, they release certain harmful gases into the air. These

Слайд 2acid rains

Слайд 3

Слайд 4 Many nations of the Northern Hemisphere, such

as the United States, Canada, Japan, and most of the

countries of eastern and western Europe, burn coal and petroleum, known as fossil fuels, in automobiles, electric power plants, and factories. Because of this, acid rain has become a serious form of pollution in North America and Europe.

acid rains

Many nations of the Northern Hemisphere, such as the United States, Canada, Japan, and

Слайд 5

Слайд 6THE EFFECTS OF ACID RAIN
When acid rain pollutes lakes and

streams, it can kill the organisms that live in them.

Acid rain is particularly harmful to fish and other aquatic life forms.

THE EFFECTS OF ACID RAIN When acid rain pollutes lakes and streams, it can kill the organisms

Слайд 7 A substance called aluminum is naturally found

in the soil. Acid rain can bring aluminum out of

the soil. Such a process is called leaching. Aquatic life can be poisoned by aluminum that is dissolved in water.

The Effects of Acid Rain

A substance called aluminum is naturally found in the soil. Acid rain can bring

Слайд 8 The Effects of Acid Rain

Слайд 9Acid rain also damages various kinds of vegetation, including agricultural

crops and trees. In addition, acid rain corrodes, or wears

away, outside surfaces of buildings and other structures. Some of the world's great monuments, including the cathedrals of Europe and the Colosseum in Rome, have shown signs of deterioration caused by acid rain

The Effects of Acid Rain

Acid rain also damages various kinds of vegetation, including agricultural crops and trees. In addition, acid rain

Слайд 10

Слайд 11

Слайд 12 The Extent of the Problem
By the early 1990s tens of

thousands of lakes had been destroyed by acid rain. The

problem has been most severe in Norway, Sweden, and Canada. Damage from acid rain is not limited by geographic boundaries

The Extent of the Problem By the early 1990s tens of thousands of lakes had been

Слайд 13

Слайд 14This is because winds carry the pollution around the globe.

For example, some studies indicate that pollution from coal-powered electric

generating stations in the midwestern United States may be causing severe acid rain problems in eastern Canada and the northeastern United States.

The Extent of the Problem

This is because winds carry the pollution around the globe. For example, some studies indicate that pollution

Слайд 15

Слайд 16Despite much debate and discussion between many countries, there is

still no clear solution to the problem. The chief reason

is that it is expensive to control the pollution. However, since the damage from acid rain to the environment is permanent, the environmental costs are greater.

The Extent of the Problem