Заполните пропуски, пользуясь предложенными словами

1. In the Sahara there is a ... of water. 2. Air ... is a big problem in modern cities. 3. Carbon dioxide ... the greenhouse effect. 4. ... should be recycled. 5. You must have a license if you want to buy a ... . 6. This fish has ... , you should not eat it. 7. The ... bomb ruined the city and made the water radioactive. 8. Moscow has a ... of over 10 million. 9. It is a film about a boy who ... the bombing of Hiroshima. 10. Endangered animals are often kept in zoos where they are ... from hunters.