Q. What is the source of chlorofluorocarbons?
A. aerosol sprays foams
B. exhaust fumes of motor vehicles
C. incomplete burning of wood
D. none of above
Answer: aerosol sprays foams
A. aerosol sprays foams
B. exhaust fumes of motor vehicles
C. incomplete burning of wood
D. none of above
Answer: aerosol sprays foams
