Our Environment

2. When items breakdown and become part of the soil
7. Unable to be replaced when it is used up
10. The first part of reducing the amount of waste
14. Changing of air, water, and land from clean and safe to dirty and unsafe
15. Resources supplied by nature
16. Plants get nutrients and water they need from this
17. Human waste, detergents and chemicals are common sources of this
19. Industrial waste, fertilizers, pesticides and farm animal feces are causes of this
20. Another form of energy

1. Breakdown and are absorbed by the environment
3. The body uses this to produce energy
4. What percentage of the U.S. waste is disposed of by incineration
5. Huge pits where waste is buried between layers of the Earth
6. What percentage of the Earth's surface is water
8. Many sources of this are in limited supply and cannot be replaced once used up
9. Disposing of waste by burning it
11. Limiting the amount of waste by reusing items
12. When air contains dust, smoke, chemical particles and smog it is called
13. 96.5% of the Earth's water is this kind of water
18. One of the most essential nutrients