Across
- 3. - an amount of gas or vapour that smells strongly or is dangerous to inhale.
- 5. - plants, animals, and other organisms that live in the salt water of seas or oceans
- 8. - toxic substance that causes injury or death when absorbed or ingested
- 12. - persistently dry hot weather that does not allow plants to meet their water needs
- 13. - an area or place for putting garbage
- 14. - a person who tries to prevent dangerous factors affecting the living environment
Down
- 1. - the dying out or extermination of a species
- 2. - are natural energy sources
- 4. - rapid growth of cities
- 6. - to suffer (for a long time) from some disease
- 7. - a period and situation where starvation and resulting diseases are the main causes of death
- 8. - action to stop something from happening
- 9. - a mixture of gases that are in the earth’s crust
- 10. - water spoiled from use in production
- 11. - to harm the environment by exhaust gases, waste water