Расскажите по-английски о результатах исследования, проведенного Всемирной организацией здравоохранения‚
Text ECOLOGICAL PROBLEMS OF BIG CITIES

There are over 150 supercities in the world with population from one to 15 million and more. Tokyo, New York, London, Mexico City, Rio de Janeiro and Moscow arejust a few of the cities hich have become supercities.

People in the supercities suffer from polluted environment: bad water, bad air and noise. A new term, urban (городской) climate, is used now for such cities. It means high temperature, oppressive atmosphere and intensive smog.

Some experts consider that it is practically impossible to protect the big cities from pollution. The World Health Organization (WHO) studied air pollution around the world for over eight years. It measured two things: the level of sulphur dioxide ($02) in the air

and the level of smoke. Sulphur dioxide and smoke pollute water and have serious effect on forest, buildings and health of people.

In the WHO report it is shown that the cities with the most considerable level of C02 in the air are Milan, Teheran, Prague, Santiago and 550 Paulo. However, some cities with clean air get worse in winter. Helsinki, for example, becomes one of the cities with the largest proportion of it in the air in winter. This must be connected with the heating of houses. One can also mention (упоминать) Glasgow and Warsaw which suffer in the same way.

at last the winter holidays came! i was very happy!     i didn't have   to get up early in the morning and run to school. i could stay in the bed till midday. but i didn't want to sleep. there were a lot of things to do.

the weather was fine so my freinds and i went to the skating- rink almost every day. it was fun!

then i spent a week in the country where my grandfather and grandmother lived. it was great. i drank milk and eat a lot of tasty food which my granny prepared for me.

i have many friends in this village because i go there every holidays.

we went to the forest to ski, we made snowmen and played snowballs. we even played hockey!

but the winter holidays were over and i returned to the city again.  i liked my holidays very much.

наконец наступили зимние каникулы! я был счастлив!   я не должен был вставать рано утром и бежать в школу. я мог   оставаться в постели до полудня. но я не хотел спать. было так много дел.

погода была хорошая, так что мои друзья и я ходили на каток почти каждый день. это было весело!

затем я провел неделю в деревне, где   живут  мои дедушка и бабушка  . это было здорово. я пил молоко и ел много вкусной пищи, которую моя бабушка готовила для меня.

у меня много друзей в этой деревне, потому что я езжу туда каждые каникулы.

мы ходили в лес кататься на лыжах, мы делали снеговиков и играли в снежки. мы даже играли в хоккей!

но зимние каникулы закончились, и я вернулся в город снова. мне понравились мои каникулы.