martes, 28 de septiembre de 2010

EARTH´S ATMOSPHERE

VOCABULARY:

renewable resource: a resource that can be replaced in a short period of time.


ozone layer: a layer of ozone gas in the atmosphere


fossil fuel: a fuel formed from the decay.


smog: a mixture of smoke and fog


acid rain: moisture that falls to Earth after being mixed with wasted from burne fossil fuels.

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