<span>Oklahoma City is the capital of the state that shares it's long southern border</span>
A geologist studies the earth's history.
Match the following:
a. mangrove 3. a small tropical tree that grows in wetlands near salt water
b. land degradation 2. reduced ability of the soil to support life
c. hectare 1. (ha) a unit of measure equal to roughly 2.5 acres or exactly 10,000 square meters
d. salinization 4. the development of higher than normal salt content in the soil
