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Earth Resources - C25 - 2

Skylar S

Earth Resources - Chapter 25 - Period 2

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Across
1.removing all the salt from ocean water to make freshwater
8.pollutants in the air occur in quantities that become harmful to human health and the health of the enviroment
10.natural resources that it is possible to use indefinitely without causing a reduction in the available supply
11.material left after an ore is extracted
12.natural resource that can be mined at a profit
Down
2.resources 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 of years
3.resources that Earth provide
4.mixture of gravel, sand, and crushed stone that naturally accumulates on or close to Earth's surface
5.substance that can adversely affect the survival, health, or activities of organisms
6.replacement of renewable resources at the same rate at which they are consumed
7.process whereby productive land becomes desert
9.deeper soil layer lies on a base of unweathered parent rock

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