Across
- 3. Substances that when dissolved in water are capable of reacting with a base to form salts and release hydrogen ions.
- 5. An inorganic compound whose only negative part is the elemnt oxygen.
- 6. waste that humans put down drains
- 7. Energy transmitted in the form of electromagnetic waves or subatomic particle
- 8. air pollution
- 9. dust heap
- 10. litter
- 12. City with many radiation
- 13. cheeseparings
Down
- 1. international environmental organization
- 2. not used for human garbage
- 3. any effect caused by humans
- 4. poisonous materials
- 11. something that causes damage to the environment
- 13. of top concern