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Earth Resources C25-2

Mahogony Hunter

Earth Resources C25-2

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Across
1.the process where by productive land becomes desert.
3.pollutants in air occur in quantities that become harmful of the environment. (2 Words)
5.with all the water available in the oceans, some countries have explored the possibility of removing salt from ocean water to provide freshwater.
7.material left after the ore is extracted.
8.a mixture of gravel, sand, and crushed stone that naturally accumulates on or close to earth's surface.
9.substances that can adversely affect the survial, health, or activities of organism.
11.deeper soil layer les on a base of unweathered parent rock.
12.natural resources that it is possible to use indefinitely with out causing a reduction in the available supply. (2 Words)
Down
2.that exists in a fixed amount in various places in Earth's crust and can be replaced only by geological physical, and chemical processes that take hundreds of millions or years. (2 Words)
4.resources that earth provides. (2 Words)
6.replacement of renewable resources at the same rate at which they are consumed. (2 Words)
10.natural resources that can be mined as long as its value on the market is greater that the cost of its extraction.

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