Across
- 3. long-term shifts in temperatures and weather patterns
- 6. the most-emitted type of greenhouse gas
- 7. a community of living things interacting with their environment
- 8. the planet we live on
- 9. the variety of living species on our planet
Down
- 1. term describing species with a high risk of going extinct
- 2. the process of planting new trees in degraded areas
- 4. 9.1 billion tons of this material have been produced since it was introduced in the 1950s
- 5. geothermal, solar, and hydropower are examples of this type of energy