UPSC PRELIMS · GEOGRAPHY · MAGNETITE POLLUTION
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.
Take a breath. Choose one. Press A–D on your keyboard if you like.
EXPLANATION
Magnetite nanoparticles can be generated by combustion and braking-related pollution, with vehicles and power plants among important sources; the official key selects 1, 2 and 4.
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