Question

What is meant by ozone shield? Name two ozone depleting substances. How do ozone depleting substances affect ozone shield?

Answer 1

Chlorofluorocarbons (CFCs) and other halogenated ozone depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion. The total amount of effective halogens (chlorine and bromine) in the stratosphere can be calculated and are known as the equivalent effective stratospheric chlorine (EESC).