Q. Which of the following are greenhouse gases?

1. Methane
2. Carbon dioxide
3. Nitrogen dioxide

Select the correct option from the codes given below:
Answer: Only 1 & 2
Notes: Methane (CH4) and carbon dioxide (CO2) are well-known greenhouse gases responsible for absorbing and emitting infrared radiation. Nitrogen dioxide (NO2), while an air pollutant, is not categorized as a primary greenhouse gas. Other key greenhouse gases include water vapor, ozone, nitrous oxide, chlorofluorocarbons (CFCs), and hydrofluorocarbons (HFCs).