Question

Of the following metals which one pollutes the air of a big city?

• A. Copper
• B. Chromium
• C. Lead
• D. Cadmium

Answer 1

The correct option is C Lead

Lead pollutes the air of a big city.

Lead (Pb) is a metal found naturally in the environment as well as in manufactured products. The major sources of lead emissions have historically been from fuels in on-road motor vehicles (such as cars and trucks) and industrial sources.

In the past, motor vehicles were the major contributor of lead emissions to the air .

Major sources of lead emissions to the air today are ore and metals processing and piston-engine aircraft operating on leaded aviation gasoline. The highest air concentrations of lead are usually found near lead smelters. Other stationary sources are waste incinerators, utilities, and lead-acid battery manufacturers.