With respect to ozone depletion, consider the following statements:
1. Chlorofluorocarbons (CFCs) are nontoxic organic molecules that help in ozone depletion.
2. Polar stratospheric clouds provide a surface for the reactions causing ozone depletion.
3. Free Chlorine radicals form when CFCs are broken down by UV radiations.
Which of the statements given above are correct?
1
1 and 2 only
2
2 and 3 only
3
1 and 3 only
4
1, 2 and 3