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Earth Resources-C25-2

Tyler I.

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Across
1.all water available in the oceans, some countries have explored the possibility of removing salt from ocean water
4.pollutants in air occur in quantities that become harmful (2 Words)
5.deep soil layers lies on a base of unweathered parent rock
7.the replacement of renewable resources at the same rate at which they are consumed.
8.natural resources that it is possible to use indefinitely without causing reduction on the available supply
9.the resources that Earth provides
11.substances that can adversely affect the survival health or activities of organisms
12.the process where by productive land becomes desert
Down
2.a resource that exits in a fixed amount in various places in Earth's crust and can be replaced only by geological, physical, and chemical process that take hundreds of millions of years
3.material left after ore is extracted
6.a natural resource that can be mined at a profit
10.a mixture of gravel, sand, and crushed stone that naturally accumulates on or cole to Earth's surface

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