Which of the following protects life on earth from harmful effects of UV radiations…

CHEMISTRY · Single correct · GCSE · Chemistry · Chemistry of the Atmosphere · Chemistry of the Atmosphere

Problem

Which of the following protects life on earth from harmful effects of UV radiations from sun? (1)

\text{N}_2

(2)

\text{CO}_2

(3)

\text{O}_2

(4)

\text{O}_3