What is the source of chlorofluorocarbons?
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