Page 3 - 3 Home Assignment I(Obj &Subj)-Ozone layer Depletion
P. 3
(b) Give two ways by which biodegradable substances would affect the
environment?
Q.6 (a) Explain how is ozone formed in the atmosphere? 5 D
(b) How does it protect living beings from harmful radiations of the sun?
(c) Where are CFCs used?
