Context:
As per the journal “Earth System Science Data”, India is the world’s second-largest emitter of nitrous oxide after China.
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- Nitrous oxide emissions largely come from nitrogen fertilizer usage and from animal manure.
- The top five country emitters by volume of anthropogenic N2O emissions in 2020 were China (16.7%), India (10.9%), the United States (5.7%), Brazil (5.3%), and Russia (4.6%).
Source of Emission
- The major source of these emissions comes from fertiliser, according to a global assessment of N2O emissions published in the journal Earth System Science Data.
- N2O emissions from human activities have increased by 40% (three million metric tons of N2O per year) in the past four decades.
- Agricultural production using nitrogen fertilizers, such as ammonia, and animal manure contributed 74% of the total anthropogenic N2O emissions in the last decade.
- N2O emissions from human activities are responsible for 6.4% of the effective radiative forcing of greenhouse gases and have added about 0.1°C to current global warming.
Nitrous Oxide (N2O)
- It is also known as laughing gas —a type of short-acting sedative. It’s a colorless, slightly sweet-smelling gas that one can breathe in through a mask or nosepiece.
- It is a greenhouse gas that heats up the atmosphere far more than carbon dioxide.
- Nitrous oxide stays longer than carbon dioxide in the atmosphere and is rising rapidly.
Recent Data of Nitrous Oxide concentration
- The concentration of atmospheric N2O reached 336 parts per billion in 2022 which is 25% more than the preindustrial levels.
- Whereas, the concentration of carbon dioxide was 417 parts per million in 2022. So, the current level of carbon dioxide in the atmosphere is a thousand times more than that of nitrous oxide.
- Anthropogenic N2O emissions must decline by at least 20% relative to 2019 levels by 2050.” For net zero emission of Paris Agreement (stabilizing global temperatures below 2°C from pre-industrial levels)
Some other Greenhouse gases
Greenhouse gases (also known as GHGs) are gases in the earth’s atmosphere that trap heat.
- Carbon Dioxide as Carbon
- HFCs
- Methane
- NF3
- Nitrous Oxide
- PFCs
- Sulphur hexafluoride