Across
- 6. fuels such as oil, coal, natural gas
- 8. the total amount of greenhouse gases produced to directly and indirectly support human activities
- 9. protecting natural sources
- 11. the condition of having a population so dense as to cause environmental deterioration
- 13. community of animals, plants living in an area which provides what they need to survive
- 14. to release pollutant substances into air
Down
- 1. pollution that affects the air and is usually caused by smoke or other harmful gases
- 2. gradual warming of the earth's surface temperature
- 3. destruction of forests
- 4. absorbs a lot of heat from the sun's rays
- 5. rain mixed with acid
- 7. noise with harmful impact on the activity of human or animal life.
- 10. the process of transforming waste into new products
- 12. synonym for garbage or trash