Q. What is the source of lead compounds?
A. aerosol sprays foams
B. exhaust fumes of motor vehicles
C. incomplete burning of wood
D. none of above
Answer: exhaust fumes of motor vehicles
We will be happy to hear your thoughts
A. aerosol sprays foams
B. exhaust fumes of motor vehicles
C. incomplete burning of wood
D. none of above
Answer: exhaust fumes of motor vehicles