Question

(a) How is ozone formed in the upper atmosphere of the earth? (b) Why is the damage to ozone layer a cause of concern to us?

Answer 1

a. when single atom of oxygen react with o^2 in atmosphere it make o^3 which is ozone
b. when ozone is damaged sun ultreviolet rays can reaaches to us and can do many disesses like skin cancer etc

Answer 2

O2—UV—>O + O
O + 02 —> O3 (ozone)
Certain harmful chemicals such as chlorofluorocarbons (CFCs), are released into the air. These accumulate in the upper atmosphere and react with ozone resulting in reduction of the ozone layer by forming a hole. Thus, ozone layer becomes thinner and gets depleted allowing more ultraviolet rays to pass through the earth’s atmosphere. These radiations are highly damaging to organisms and cause skin cancer, damage to eyes, including increased incidence of cataract and damage to immune system of human beings and other animals.