Ozone layer is present in which of the following layers of earth:

The ozone layer is mainly found at _____  above the surface of the earth

Which of the following represents ozone gas molecule:

Ozone layer absorbs sun’s which of the following radiation and prevents it from falling on earth’s surface:

Average ozone concentration in Earth’s atmosphere as a whole is only about ____ parts per million:

UV radiation can cause which of the following more significantly:

Ozone in the Earth’s stratosphere is created by UV light striking ____ molecule

Which one of the following is largest ozone depletion substation that is emitted through activities of human:

One chlorine or bromine radical liberated has the capability to act as catalyst and breakdown ____number of ozone molecules:

Which of the following compounds have less severe effect on ozone layer:

Which of the following is more reactive in lower atmosphere (Troposphere):

The Montreal  Protocol treaty has been amended to ban CFC production after _____ in the developed countries:

Ozone is an air pollutant in Troposphere:

Scientists predict that the ozone layer will return to pre-1980 levels by _______ :

Complete phase out dead line of R-22 is by ______ :