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Earth Resources - C25 - 2

Evan Priest

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Across
5.substances that adversely affect the survival or health of organisms
6.substances that negatively effect the air
7.a mixture of gravel sand and crushed stone that naturally accumulates on or close to Earth's surface
8.natural resources that are possible to use indefinitely
9.deeper soil layer lies on a base of unweathered parent rock
10.a natural resource that can be mined at a profit
11.the process whereby productive land becomes desert
12.when salt water is distilled
Down
1.the replacement of renewable resources at the same rate at which they are consumed results
2.a resource that exist in a fixed amount in various places
3.resources that Earth provides
4.material left after the ore is extracted

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