Environment

Biodiversity, climate change, pollution, protected areas. Filter by topic or year.

2 questions

2022 · Question 44 · Pollution
In the context of WHO Air Quality Guidelines, consider the following statements : 1. The 24-hour mean of PM2·5 should not exceed 15 µg/m3 and annual mean of PM2·5 should not exceed 5 µg/m3. 2. In a year, the highest levels of ozone pollution occur during the periods of inclement weather. 3. PM10 can penetrate the lung barrier and enter the bloodstream. 4. Excessive ozone in the air can trigger asthma. Which of the statements given above are correct ?
Choose your answer(a)1, 3 and 4(b)1 and 4 only(c)2, 3 and 4(d)1 and 2 only
Source: UPSC, Civil Services (Preliminary), General Studies Paper I (opens in a new tab)
2022 · Question 100 · Pollution
Consider the following : 1. Carbon monoxide 2. Nitrogen oxide 3. Ozone 4. Sulphur dioxide Excess of which of the above in the environment is/are cause(s) of acid rain ?
Choose your answer(a)1, 2 and 3(b)2 and 4 only(c)4 only(d)1, 3 and 4
Source: UPSC, Civil Services (Preliminary), General Studies Paper I (opens in a new tab)