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

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

درج ذیل دھاتوں میں سے کون سی دھات کسی بڑے شہر کی ہوا کو آلودہ کرتی ہے؟
Explanation

Lead is the metal that pollutes the air of big cities.

Due to the usage of lead petroleum,

when a lead is emitted, it causes damage to air and is a major pollutant.


NA21-8-2023