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6.1 & 6.2 Biology Vocabulary

Across
These airborne acids can drift for many kilometers before they fall
Occurs if a pollutant is picked up by an organism and is not broken down or eliminated from its body
Natural processes cannot replenish then within a reasonable amount of time.
This happened in the great plains in the 1930s
Is the practice of clearing large areas of land to plant a single highly productive crop
Down
Loss of forests
Using resources in such an environmentally conscious way
Can be produced or replaced by a healthy ecosystem
Is harmful material that can enter the biosphere
A gray-brown haze formed by chemical reactions among pollutants released into the air by industrial processes and automobile exhaust