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According to Central Pollution Control B...

According to Central Pollution Control Board (CPCB), particulate size _____ micrometers or less in diameter are hazardous to human health.

A

25

B

10

C

2.5

D

4.5

Text Solution

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The correct Answer is:
To solve the question, we need to identify the particulate size that is considered hazardous to human health according to the Central Pollution Control Board (CPCB). ### Step-by-Step Solution: 1. **Understand the Context**: The question refers to the classification of particulate matter by the CPCB, which is responsible for monitoring and controlling pollution in India. 2. **Identify Categories of Particulate Matter**: The CPCB categorizes particulate matter based on their size and potential health impacts. The main categories mentioned are: - Settleable particulate matter (greater than 10 micrometers) - Suspended particulate matter (less than 10 micrometers) - Particulate matter that causes severe lung disorders (between 4 to 5 micrometers) - Most hazardous particulate matter (less than 2.5 micrometers) 3. **Focus on Health Impacts**: The question specifically asks for the size that is hazardous to human health. The transcript indicates that particulate matter with a diameter of less than 2.5 micrometers is categorized as the most harmful and can lead to severe health issues, including respiratory problems and even death. 4. **Select the Correct Answer**: Based on the information provided, the particulate size that is hazardous to human health is **2.5 micrometers or less**. ### Final Answer: According to the Central Pollution Control Board (CPCB), particulate size **2.5 micrometers or less** in diameter are hazardous to human health. ---
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