Across
- 4. A specific location where pollution originates
- 5. Substances that are either poisonous flammable corrosive or explosive.
- 9. The amount of a chemical required to kill half of a population
- 10. The ability of a chemical to harm a living thing after repeated exposures
- 12. A source of pollution where pollutants originate from an unknown location
- 14. A specialized area that safely disposes of hazardous or toxic materials
- 15. A living thing whose condition is description of a particular environment
- 16. An area which uses a waterproof lining filled with compacted garbage covered with soil
- 20. Substances which accumulate in the environment and do not break down or do so very slowly
- 22. Water that filters down through the soil into the ground
Down
- 1. An alteration of the environment which causes harm to living organisms
- 2. The process of using living things to break down toxic substances into safer ones
- 3. A tank containing bacteria in order to facilitate the breaking down of toxic substances into safer ones
- 6. The liquid that is formed as wastes decompose and rainwater filters through a landfill
- 7. The ability of a chemical to cause harm to living things
- 8. Able to be broken down through natural processes
- 11. Substances which can be broken down into harmless compounds through natural processes
- 13. An organism visible to the human eye which lacks a backbone
- 17. The ability of a chemical to harm a living thing after just one exposure
- 18. An underground reserve of water.
- 19. A specific substance introduced to an environment which has negative or unintended effects
- 21. A substance which can be used to dissolve another substance