Human Impact

Lemon juice

Milk

Seawater

Bleach

2.45

3.5

2

1.45

conservation

deforestation

erosion

urbanization

stop using trucks for transportation

produce more petroleum to meet demand

use transportation that requires no energy source

find alternative energy resources for transportation

U.S. petroleum production increases slowly

U.S. petroleum production decreases slowly

U.S. petroleum production stays the same

U.S. petroleum production plummets