1. biodegradable
2. condensation
3. conservation
4. evaporation
5. fossil fuel
6. humus
7. coke
8. natural resource
9. nonrenewable resource
10. pollutant
11. pollution
12. precipitation
13. renewable resource
14. soil profile
15. topsoil
16. borrow
17. lend
18. glaring
19. eager
20. February
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