nature.
Large cities with thousands of smoky industrial enterprises pollute the air we breathe and the water we drink. Every year world industry pol - lutes the atmosphere with about 1,000 million tons of dust and other harmful substances. Many cities suffer from smog. Beautiful old forests disappear forever. Their disappearance upsets the oxygen balance. As a result some rare species of animals, birds, fish and plants disappear for - ever, a number of lakes and rivers dry up.
The pollution of air and destruction of the ozone layer are the results of mans attitude towards Nature.
The protection of the environment is a universal concern. We must be very active to create a serious system of ecological security.
The rivers, seas and oceans are becoming seriously polluted, a similar situation is developing in the atmosphere. Many large cities suffer from air pollution.
To eliminate environmental pollution people should use good will and make considerable investments. Only joint efforts of many scientists and public organizations can deal with the problem.
5) Объяснение грамматического материала по теме "Степени сранения прилагательных".
Грамматика степени сравнения прилагательных и наречий
Прилагательные big/small
The first bag.
This bag is small. This bag is the smallest bag.
The second bag.
This bag is bigger than the first bag, but smaller than the third bag.
The third bag.
This bag is the biggest bag.
Наречия fast/slow
Cheetahs run fast.
Hedgehogs walk slowly.
Snails crawl slowly.
Сравнительная степень
Cheetahs run faster than hedgehogs. Hedgehogs walk more slowly than cheetahs. Snails crawl more slowly than hedgehogs.
Превосходна
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