Question
UPSC Prelims 2021 Question:
- Brakes of motor vehiclesÂ
- Engines of motor vehiclesÂ
- Microwave stoves within homesÂ
- Power plantsÂ
- Telephone lines
Select the correct answer using the code given below.
Answer (Detailed Solution Below)
Option 2: 1, 2 and 4 only
Detailed Solution
Explanation:
- Magnetite is an iron-oxide mineral that occurs naturally on Earth. However, it can be released to the environment through human activities:
- It has been identified in diesel exhaust, as brake-abrasion particles, in the air of underground stations, along railway lines, at welding workplaces, and in the emissions from industrial combustion processes. There is no evidence of generation of magnetite particles from either domestic microwave stoves or telephone lines.
Therefore, option (2) is the correct answer.
Relevance: Toxic air pollution particles found in human brains
Subject: EnvironmentÂ
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