Sunday, September 26, 2010

vocabulary 16

renewable resource: a resource that can be replaced in a short period of time.
ozone layer: a layer of ozone gas in the atmospherre that screens out much of the Sun´s UV rays.

fossil fuel: a fuel formed from the decay of ancient forms of life.
smog: a mixture of smoke and fog.

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

No comments:

Post a Comment