  This article considers an opportunity of disinfecting a part of the Earth
surface, occupying a large area of ten thousand square kilometers. The sunlight
will cause dissociation of molecular bromine into atoms; each bromine atom
kills thirty thousand molecules of ozone. Each bromine plate has a mass of
forty milligrams grams and destroys ozone in the area of hundred square meters.
Thus, to form the ozone hole over the area of ten thousand square kilometers,
it is required to have the total mass of bromine equal to the following four
tons.
