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WHAT IS ACID RAIN?
Acid rain is a result of air pollution. When any type of fuel is burnt, (17)
The smoke that comes from a fire or the fumes that come out of a
car exhaust don't just contain the sooty grey particles that you can see -
(18)
Power stations, factories and cars all burn fuels they also contains lots of
invisible gases (19) . Some of these gases (especially nitrogen oxides
and sulphur dioxide) react with the tiny droplets of water in clouds to
form sulphuric and nitric acids. The rain from these clouds then falls as
very weak acid - (20) . The release of sulphur dioxide can also
occur naturally when a volcano erupts.
Acid rain can be carried great distances in the atmosphere, not just
between countries but also from continent to continent. The acid can also
take the form of snow, mists and dry dusts. The rain sometimes falls
many miles from the source of pollution but wherever it falls (21)
In the 1970s the effects of acid rain were seen at their worst.
Forests all over the world are dying, in Scandinavia the fish are dying;
lakes were crystal clear (22) . Many of Britain's freshwater fish are
threatened, their eggs are damaged and deformed, fish are being hatched.
This in turn leads to fish-eating birds and animals also being affected.
A it can have a serious effect on soil, trees, buildings and water.
B acid rain can cause trees to grow more slowly.
C seems to have more effect in some areas than it does in others.
D but now contain no living creatures or plant life.
E that is why it is known as 'acid rain".
F that can be even more harmful to our environment.
G and therefore they all produce polluting gases.
H lots of different chemicals are produced.
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ivangladkikh    3   16.02.2020 15:22    5