Across
- 4. the action of clearing a wide area of trees.
- 7. a substance or object capable of being decomposed by bacteria or other living organisms.
- 9. a situation in which a species no longer exists.
Down
- 1. convert waste into reusable material.
- 2. a prolonged period of low rainfall, leading to a shortage of water.
- 3. a natural resource or source of energy not depleted when used.
- 5. the weather conditions prevailing in an area in general or over a long period.
- 6. the presence in or introduction into the environment of a substance which has harmful or poisonous effects.
- 8. an overflow of a large amount of water beyond its normal limits.