1
careful management of the environment and natural resources
2
not covered with forest
3
a group of individuals that belong to the same species, live in the same area, and breed with each other
4
when the last members of a species die, the species becomes extinct
5
contamination of the natural environment
6
remove the trees from
7
organisms that ingest organic matter that is living or recently killed
8
organisms having some common qualities; kind or type
9
the type of environment in which an organism normally lives
10
the plants of a given region
11
a colorless gas that is a screen for ultraviolet radiation
8
6
11
10
2
9
1
5
7