Genres
- Climatic changes
- NATURE / Environmental Conservation & Protection
- Nature
- Effect of human beings on
- Environmental conditions
- HISTORY / United States / State & Local / Southwest (AZ, NM, OK, TX)
- Environmental policy
- Social conditions
- Human ecology
- History
- Nature, effect of human beings on
- Environmental policy, united states
- Sangre de cristo mountains (colo. and n.m.)
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