UPSC Previous Year Question | Prelims GS | 2021

Magnetite particles, suspected to cause neurodegenerative problems, are generated as environmental pollutants from which of the following? 1. Brakes of motor vehicles 2. Engines of motor vehicles 3. Microwave stoves within homes 4. Power plants 5. Telephone lines Select the correct answer using the code given below.

  1. 1, 2, 3 and 5 only
  2. 1, 2 and 4 only
  3. 3, 4 and 5 only
  4. 1, 2, 3, 4 and 5

Answer

Correct Answer

1, 2 and 4 only

Explanation

Airborne magnetite nanoparticles linked to neurodegenerative concerns have been traced to combustion and friction sources: vehicle brakes, vehicle engines and power plants. Microwave ovens and telephone lines are not sources of such particles.

Topics: air pollution & health, environment, magnetite nanoparticles as pollutants, pollution