Environmental Chemistry Review

2. Something that removes harmful chemicals from emisions before they are released
4. Chemical used to control insect population growth
5. Use of light to break down harmful chemicals
7. Ability of a chemical to cause harm
8. Something that tells you information about another substance
10. Precipitation with a pH less than 7
16. When toxins build up in cells
18. Chemical used to control weeds
19. Alteration of the environment producing harmful conditions
20. Material or form of energy that will cause harm

1. Use of plants to remove toxins from soil
3. The type of toxicity that requires many exposures
6. Using living organisms to break down toxic substances
9. Increase in populations of algae due to increased levels of nutrients in water system
11. Solution With a pH above 7
12. Nutrient for energy storage
13. A solution that has a pH of less than 7
14. When a acid is mixed with a base, this happens
15. Organic compound used for short term energy
17. Type of toxicity that is toxic after first exposure
21. The dose of a toxin that kills half the population