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A Lesson 5

4th grade Science

QuestionAnswer
pollution the adding of harmful substances to the water, air, or land
drought a long period of time with little or no precipitation
overpopulation a depletion of resources that occurs when too many of at least one kind of living thing inhabits an ecosystem
acid rain harmful moisture that falls to Earth after being mixed with wastes from burned fossil fuels
Created by: ammybear81
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