Progress Test (Unit 6, 11th form)
1. __________ show that by 2050 the world’s population will be 3.5 billion.
2. Pollution from cars and factories is causing harmful __________ to build up in the Earth’s atmosphere.
3. In big cities, the increasing number of cars causes serious __________ and fills the air with smog.
4. __________ are chemicals that are used for killing insects, but they can have a bad effect on the food chain.
4. There are many endangered species that could soon become __________ if we do not protect them.
6. Taking two bottles to the __________ for recycling saves enough energy to boil water for five cups of tea.
7. __________ is a general increase in the temperature that is currently affecting many countries.
8. __________ are the main cause of poor air quality and can make it difficult for people to breathe.
9. Many people are nervous about __________ crops because nobody knows for certain if they affect human health.
10. Serious __________ are caused by the greenhouse effect, leading to violent storms and flooding.
11. Endangered ________
12. Ecological ________
13. Irreparable ________
14. Sustainable ________
15.Climatic ________
16. Tidal ________
17. Natural ________
18. Demographic ________
19. Bottle ________
20. Tropical ________
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