1. Перевод + ответы на попросы Ecology is a science which studies the relationship between all forms of life on our planet with its environment. They are polluted with all kinds of technological, agricultural, chemical, nuclear and other wastes. When air, land, or water becomes dirty, we say it is polluted. We know that polluted air, land, and water are harmful to plants, animals, and people. Air pollution, smog, water pollution, destruction of natural resources. The ozone layer in the upper atmosphere protects the world from the sun's harmful rays. The chemical used widely in aerosol cans, refrigerators, and other products are destroying this precious layer. If you throw a glass bottle on the ground it will litter the Earth forever. Never throw glass bottles on the ground. You damage the land. Aluminium cans and plastic bottles last up to 500 years. If you throw an aluminium can on the ground, it will still litter the Earth up to 500 years later. Tin cans last 100 years.

1) What does the word "ecology" mean? 2) What are the names of the environmental problems of today? 3) Does the ozone layer in the upper atmosphere protect the world from the sun's harmful rays? 4) Do you ever throw litter on the ground? Is litter a problem in your city? 5) Will it litter the Earth forever if you throw a glass bottle on the ground?

2. Раскройте скобки, поставьте глагол в нужную видовременную форму, укажите грамматическое время и переведите предложения на русский язык.
1. My friends (to go) to the disco last Sunday?.
2. The students ( not to read) this English text yet.
3. Harry’s father ( to work) for this company many years.