Assertion (A): AQI value above 400 is classified as 'Severe'.
Reason (R): Such levels cause respiratory effects even on healthy individuals.
Analyzing Assertion (A): AQI Value Above 400
The statement asserts that an AQI value exceeding 400 is classified as 'Severe'. Standard air quality indices, such as the one used by the US EPA, categorize AQI values from 301-500 as 'Very Poor' to 'Severe Plus', with levels above 400 often falling into the most critical 'Hazardous' or 'Severe Plus' category, indicating extreme pollution.
- Conclusion: Assertion (A) is true.
Analyzing Reason (R): Health Effects
The statement claims that AQI levels above 400 cause respiratory effects even in healthy individuals. High concentrations of pollutants associated with 'Severe' AQI levels can indeed trigger significant health issues, including breathing difficulties, asthma attacks, and other serious respiratory problems, affecting both vulnerable groups and healthy people.
- Conclusion: Reason (R) is true.
Evaluating the Relationship Between A and R
The classification of AQI above 400 as 'Severe' (Assertion A) is directly based on the potential for severe health impacts, such as serious respiratory effects on healthy individuals (Reason R). Therefore, Reason (R) provides a valid justification for the classification mentioned in Assertion (A).
- Conclusion: R is the correct explanation of A.
Final Answer Determination
Based on the analysis, both Assertion (A) and Reason (R) are factually correct, and Reason (R) correctly explains the severity implied by Assertion (A).
Therefore, the correct option is that both A and R are true, and R is the correct explanation of A.
Similar Questions
_______ gases trap heat in the atmosphere which makes the Earth warmer, causing global warming.
The method of soil conservation in the coastal and dry regions where rows of trees are planted to check the wind movement to protect soil cover is called?
Which of the following is NOT a primary green house gas in the earth's atmosphere?
Who is a major driving force behind the 'Narmada Bachao Andolan'?
The Sundarbans Reserve Forest (SRF) which is adjacent to India's Sundarbans National Park is located in which neighbouring country?
Any undesirable change in physical, chemical or biological characteristics of air, land, water or soil is called?
_______ determines colour, texture, chemical properties, mineral content and permeability of soil.
Which of the following three R's are regarded as environment friendly?
In the biosphere living beings are inter-related and interdependent on each other for survival. This life supporting system is known as the _________.
What does 'C' stand for in ITCZ?
Important Questions from Ecology and Environment
The Imperial Forest Research Institute was set up in 1906 in:
Buxa Tiger Reserve is located in:
Which Indian products are issued with eco - mark?
Degradation of global environment has not resulted in one of the following.
The temperate grasslands of South Africa are called:
