A. Copper
B. Chromium
C. Lead
D. Cadmium
Explanation:
Lead is the metal which pollutes the air of big cities. Due to the usage of lead petroleum, when lead is emitted out, it causes damage to air, and is a major pollutant.
A. Copper
B. Chromium
C. Lead
D. Cadmium
Explanation:
Lead is the metal which pollutes the air of big cities. Due to the usage of lead petroleum, when lead is emitted out, it causes damage to air, and is a major pollutant.