Protecting Natural Resources
Across
- 3. the practice of harvesting only the part of the plant needed for food and leaving the rest in the soil
- 10. the process of cleaning infection from a material
- 12. materials that occur in nature that can be used by people
- 13. a relationship in a system through which factors affect each other
- 14. describing material that decays through the action of bacteria or other living organisms
- 16. methods to measure the types and amounts of chemicals in water
- 18. all the living and nonliving things that interact in a given area
- 19. an artificial or natural substance that contaminates air, water, or soil
- 20. a set of steps needed to complete a successful project
- 21. water that has been used by people
Down
- 1. the practice of changing the type of crop grown in a field each season
- 2. the practice of taking care of land, water, air, and living things
- 4. a place where waste is buried underground
- 5. any type of substance that is in air and make it unsafe to breath
- 6. to save or protect
- 7. an energy resource that does not release pollutants when it is used
- 8. the variety of species on Earth or in any one environment
- 9. a facility that cleans wastewater before it is discharged into the environment
- 11. land that contains chemicals that are harmful to the environment
- 15. land that is set aside and left without buildings
- 17. a type of air pollution that results from a mixture of gases from burning fuels, air, and sunlight that makes air look hazy
- 20. a measure of how clean the air is