Depletion of ozone layer

In 1980, scientist found a hole in the protective
ozone layer.This hole is located over Antarctica.
It is as large as united states. This hole is clearly visible in a photograph
taken by satellite.

 Another hole, smaller in size was discovered
over Arctic region. Ozone layer is thinning over other parts of atmosphere. Depletion of ozone layer is caused by gases called cholorofluro-carbon(CFCS)