(a) State the cause of depletion of ozone layer. (b) Specify any two

1.	(a) State the cause of depletion of ozone layer. (b) Specify any two ill-effects that it can cause in the human body.
Answer» (a) UV radiations acts upon CFCs (chlorofluorocarbons), releasing Cl atoms (in the stratosphere) the Cl atoms degrade ozone. (b) Ageing of skin / skin cancer, inflammation of cornea / snowblindness / cataract / permanently damaged cornea. Detailed Answer: (a) The main cause of depletion of ozone layer is the increase in ozone degradation by chlorofluorocarbons (CFCs). (b) It effects caused by zone depletion in human body are : (i) It allows/UV B radiation to enter the atmosphere. (ii) Causes inflammation of cornea (snow blindness) cataract. etc. (iii) Causes ageing of skin, damage the skin cell and may even cause cancer.

(a) State the cause of depletion of ozone layer. (b) Specify any two ill-effects that it can cause in the human body.

Answer»

(a) UV radiations acts upon CFCs (chlorofluorocarbons), releasing Cl atoms (in the stratosphere) the Cl atoms degrade ozone.

(b) Ageing of skin / skin cancer, inflammation of cornea / snowblindness / cataract / permanently damaged cornea.

Detailed Answer:

(a) The main cause of depletion of ozone layer is the increase in ozone degradation by chlorofluorocarbons (CFCs).

(b) It effects caused by zone depletion in human body are :

(i) It allows/UV B radiation to enter the atmosphere.

(ii) Causes inflammation of cornea (snow blindness) cataract. etc.

(iii) Causes ageing of skin, damage the skin cell and may even cause cancer.