What has led to deterioration of air pollution ?
a) als pollution caused by industries
Sudden incsease in emission of gases
S
s people wing vehicles aftes memo vol of hestsictions
use of old vehicles
d)
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Lead (Pb) is an elemental heavy metal found naturally in the environment as well as in manufactured products. Lead can be released directly into the air, as suspended particles. Historic major sources of lead air emissions were motor vehicles and industrial sources. ... lead smelters. waste incinerators.
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