Air pollution and greenhouse gases Knowledge-Based Download PDF

Questions

1. 1.

   Which synthetic chemical compounds function as potent greenhouse gases in the lower atmosphere while also catalytically destroying the protective ozone layer in the stratosphere?

   • A) Volatile organic compounds (VOCs)
   • B) Chlorofluorocarbons (CFCs)
   • C) Heavy metal particulates
   • D) Polycyclic aromatic hydrocarbons (PAHs)
2. 2.

   Which statement accurately compares methane ($\text{CH}_4$) with carbon dioxide ($\text{CO}_2$) in the context of the enhanced greenhouse effect?

   • A) Methane has a significantly higher global warming potential per unit mass, although its atmospheric residence time is shorter than that of carbon dioxide.
   • B) Methane has a much longer atmospheric residence time than carbon dioxide, but absorbs less infrared radiation per molecule.
   • C) Methane reflects incoming shortwave solar radiation back into space, thereby exerting a net cooling effect on the troposphere.
   • D) Methane does not absorb infrared radiation directly and only contributes to climate change by depleting stratospheric ozone.
3. 3.

   Which primary air pollutant is formed in internal combustion engines when atmospheric nitrogen reacts directly with atmospheric oxygen at elevated temperatures?

   • A) Nitrogen monoxide ($NO$)
   • B) Sulfur dioxide ($SO_2$)
   • C) Carbon monoxide ($CO$)
   • D) Ozone ($O_3$)
4. 4.

   Which of the following atmospheric gases does not absorb infrared radiation and therefore does not contribute directly to the greenhouse effect?

   • A) Methane ($\text{CH}_4$)
   • B) Water vapor ($\text{H}_2\text{O}$)
   • C) Nitrogen ($\text{N}_2$)
   • D) Nitrous oxide ($\text{N}_2\text{O}$)
5. 5.

   Which of the following substances is classified as a secondary air pollutant that also acts as a greenhouse gas in the troposphere?

   • A) Carbon monoxide ($\text{CO}$)
   • B) Ozone ($\text{O}_3$)
   • C) Sulfur dioxide ($\text{SO}_2$)
   • D) Nitrogen gas ($\text{N}_2$)