Across
- 4. high concentrations found in the water in Flint Michigan
- 7. dramatic change in the temperature of water; kills animals by increasing respiration and depleting oxygen
- 10. used as a natural pesticide throughout history
- 11. released by burning coal
- 13. pond of poo full of animal poo
- 17. poopy water from animals and humans
- 18. an example is an entire farming region
- 19. appears more frequently in the United States, mostly due to lack of sanitation in restaurants
- 20. used to break down waste in water
- 21. a mean of controlling pest organisms
- 22. the water found in the middle of a septic tank that is fairly clean
- 23. a disease-causing bacteria found in raw sewage; mostly found in developing countries
- 24. often used in homes in rural areas
- 25. the solid waste material that sinks to the bottom of a septic tank
Down
- 1. microorganisms found in human intestines; a common one is E. Coli; harmful to the immune system
- 2. found in the soil where military rockets are manufactured, tested, and dismantled
- 3. legislation that established a maximum contaminant level for 77 elements and substances
- 5. the tanker that caused the largest ocean spill from an oil tanker
- 6. pollution caused by a change in the temperature in the water
- 8. the contamination of water sources caused by human activities
- 9. caused by the death of organisms due to a lack of oxygen; huge one off the Gulf of Mexico
- 12. an example is a factory that pumps its waste directly into a nearby stream
- 14. acid rain, snow, and gases
- 15. legislation in 1972 that maintains the chemical, physical, and biological properties of surface water
- 16. a species that indicted changes in their environment, such as disease-causing pathogens