Across
- 2. A community of living things and their environment working together.
- 3. Long-term changes in Earth’s weather patterns.
- 6. The variety of different plants and animals in a place.
Down
- 1. The gradual increase in Earth’s average temperature.
- 4. Gases released into the air that trap heat in the atmosphere.
- 5. Harmful substances that damage the environment in the air, soil, or water.