Consider the following statements regarding air pollution:
1. The pollutant caused by incomplete combustion of organic matter is carbon monoxide.
2. Depletion of ozone in the outer atmosphere may trigger skin cancer.
3. Acid rains are caused by SO${}_2$ and NO${}_x$.
4. The permissible standard for SO${}_2$ in the air for residential areas in India is $80\mu g/m^3$.
Which of the above statements are correct?

Q. Which of the following statements are correct ?

Q. With reference to the National Ambient Air Quality Standards (NAAQS), consider the following statements.
$1$. These are standards for ambient air quality set by Central Pollution Control Board (CPCB).
$2$. The CPCB has been conferred this power by the Air (Prevention and Control of Pollution) Act, $1981$.
$3$. The measurement of air quality is based on eight pollutants, namely, $PM10,PM2.5,NO2,SO2,CO,O3,NH3$, and $Pb$.
Which of the statements given is/are correct?

Q. Which of the following statement(s) is(are) correct?
(i) Oxygen is warming in nature whereas carbon dioxide is cooling.
(ii) Air pollution cannot be caused by biological matter.
(iii) Volcanic eruptions add valuable life supporting gases into the atmosphere.
(iv) Since plants take up fixed nitrogen, they are not affected by air pollution.

Q.

Q20. Consider the following statements:

1. State of Global Air Report is published by UNEP.

2. Air pollution was the fourth-highest cause of death among all health risks globally.

Which of the above statements are correct?

Q. The pollutant in air responsible for acid rain is carbon monoxide.