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Which one of the following metals pollutes the air of a city having large number of automobiles?

  By GK Planet Team      
Q. Which one of the following metals pollutes the air of a city having a large number of automobiles?
  1. Copper
  2. Lead
  3. Chromium
  4. Cadmium
Answer: Lead

Lead (Pb) emissions originate from the combustion of leaded gasoline. Alkyl lead compounds are used as fuel additives in larger vehicles to control engine knocking. Enough lead in the atmosphere can cause lead poisoning and other health concerns.
Lead poisoning is a type of metal poisoning caused by lead in the body. The brain is the most sensitive. Symptoms may include abdominal pain, constipation, headaches, irritability, memory problems, inability to have children, and tingling in the hands and feet. It causes almost 10% of intellectual disability of otherwise unknown causes and can result in behavioral problems. Some of the effects are permanent. In severe cases, anemia, seizures, coma, or death may occur.
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