Due to severe air pollution ozone hole has been created. In this what do we mean by 'ozone hole'?
Tiny holes have been
created in the ozone layer.
Reduction in concentration
of ozone in that area.
Burning of ozone layer due
None of these
The ozone "hole" is really a reduction in concentrations of ozone high above the earth in the
(a) a large sized hole in the ozone layer
(b) thinning of the ozone layer
(c) small holes scattered in the ozone layer
(d) thickening of ozone in the ozone layer
By 2011, scientists have been able to identify three separate holes in the Ozone layer. One in Tibet, one in the North Pole and one in Antarctica. The size of these ozone holes were calculated using the Dobson Meter and measured in Dobson units.