ozone layer



Belt of ozone gas 15 to 50 kilometers above the earth's surface where ozone is present in concentrations of a few parts per million. This layer blocks (absorbs) ultraviolet part of the solar radiation (which causes skin cancer) from reaching the earth's surface. Ozone depleting substances thin this layer resulting in large areas (called ozone Holes) having half or less ozone than normal to appear. In 1985, the UK researchers in Antarctica discovered thinning of ozone layer has been occurring since 1979. By 1988 it was established that the layer was thinning fast over the entire globe. Also called ozone shield.

Use ozone layer in a sentence

  • One of the more important reasons that people need to be environmentally friendly is to help protect the ozone layer because it is what protects the earth.

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  • With the number of vehicles on the road our ozone layer can't help but suffer some consequences from all the emissions produced.

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  • Some Republicans claim that the ozone layer has not been depleted by man's actions but I think that we are really polluting our atmosphere.

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