- Statement 1: N2O has a long atmospheric lifetime (around 109 years) compared to short-lived climate pollutants like methane (~12 years) or black carbon (days to weeks). Therefore, it is not a short-lived greenhouse gas. - Statement 2: N2O is a major source of stratospheric nitrogen oxides (NOx), which are potent ozone-depleting catalysts. Scientific studies have confirmed its significant role in stratospheric ozone depletion, especially as CFCs have been phased out under the Montreal Protocol.
Consider the following statements regarding nitrous oxide. 1. Being a short-lived greenhouse gas, it substantially contributes to global warming. 2. When it reaches the stratosphere, it reacts with ozone and depletes it, with an impact comparable to that of CFCs. Which of the above statement/s is/are correct?
Asked in GPSC Prelims CSP 2 2024 · Topic: Greenhouse Effect and Climate Change (Composition, Sources, and Radiative Forcing of Major Greenhouse Gases (GHGs))
More Environment and Ecology questions
- Which of the following are the sources of methane? 1. Biomass burning 2. Wastewater treatment 3. Coal mining 4. Permafrost
- Apart from carbon dioxide, which of the following gases also has a role in climate change ?
- Select the correct option from the codes given below about greenhouse gases from the following: i. Methane ii. Nitrogen iii. Nitrous oxide iv. Water vapours Code :
- Which of these are true about Hydrofluorocarbons (HFCs)?
- Which of the following gas has highest contribution in global warming ?
- Which of the following greenhouse gases is entirely produced by human activities ?
- The effects of aerosols on climate is/are a. They directly reflect sunlight back to space. b. They indirectly make clouds brighter reflectors. c. Aerosols have a net cooling effect on climate systems. d. Human generated aerosols offset the impact of global warming to some extent. Which of the above effects is/are true ?
- Besides Carbon Dioxide, which of the following gases also plays a role in climate change?