Across
- 6. natural system A community of living things and the environment where they live.
- 7. forest clearing The cutting down of large areas of trees.
- 8. sustainable Describes energy that can be naturally replaced, such as wind or solar power.
- 9. change global warming (related term) Long-term changes in the Earth's weather patterns caused largely by human activity.
- 10. exhaust gases Gases released into the atmosphere, especially by vehicles and factories.
Down
- 1. variety of life The different types of plants, animals, and other living things in an area.
- 2. natural home The place where an animal or plant normally lives.
- 3. contamination Harmful substances that make air, water, or land dirty.
- 4. reuse, process again To turn used materials into new products.
- 5. protection, preservation The protection of nature and wildlife.