Unit 7

3. low population density outside of the city
4. low population density communities that are not directly connected to the metropolitan area
5. fire that originates from surface fires, they smolder underground burning up humus and soil microbes for days or weeks and are hard to put out
8. We deplete or degrade shared/public resources for our own self interest
11. maximum amount that can be harvested without damaging the existence of the resource in the future
14. Cities fall apart, physically and socially, as people migrate to suburbs reducing city revenue generated from taxes.
15. a cost/benefit of the goods/services NOT included in the purchase price

1. Land degradation severe enough that land becomes desert, unable to support vegetation
2. Cities and their suburbs actually create their own micro-climate and tend to be warmer than rural areas
6. Planting trees and crops together
7. fire that happens in areas that are poorly managed, lots of undergrowth allows fire to burn very hot and spread quickly from tree top to tree top
9. Parks and large areas of forest left in and around developments
10. Large expanses of undeveloped land covered mostly with grasses or brush suitable for grazing livestock but too dry to farm
12. When the urban area expands outward into the rural surroundings
13. fire of only burn underbrush, little damage to mature trees