Earlier leaded petrol used to be the most widespread though easily preventable source of urban air p...........

Environment and Ecology (Easy) Pollution

Earlier, leaded petrol used to be the most widespread, though easily preventable, source of urban air pollution in the world. According to WHO (World Health Organisation). 15-18 million children in the developing countries are already suffering from permanent brain damage due to lead poisoning. Why is tetra- ethyl lead added to petrol?

It prevents engine knocking

Reduces vehicular emissions

Increases life of motor tyres

None of the above

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Explanation:

Tetraethyl lead (TEL), also spelled tetraethyllead, organometallic compound containing the toxic metal lead that for much of the 20th century was the chief antiknock agent for automotive gasoline, or petrol. Beginning in the 1970s, “leaded gasoline” was phased out, first in the United States and then in Europe and around the world, on account of its contribution to lead poisoning and its interference with pollution-control devices installed in automobiles. Hence option 1st is correct.