Which of the following changes would be likely to make terrestrial life on this planet impossible?

Options

A. A decrease in mean temperature by `10^@` C
B. Change in an atmosphere permitting all the solar radiation reaching the upper atmosphere to penetrate to the surface of the earth
C. Change in an atmosphere permitting all the solar radiation reaching the upper atmosphere to penetrate to the surface of the earth
D. Change in an atmosphere permitting all the solar radiation reaching the upper atmosphere to penetrate to the surface of the earth

Answer

B

Explanation

Due to thinning of the ozone layer UV rays from the sun reaching the upper atmosphere and cause skin cancer, skin diseases, cataract etc.