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Global Nitrous Oxide Assessment Report
November 29 , 2024
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- Nitrous oxide has a lifetime of 120 years and is approximately 270 times more powerful than carbon dioxide per tonne of emission at warming the Earth.
- Its anthropogenic emissions are responsible for approximately 10% (around 0.1°C) of net global warming to date.
- The atmospheric abundance of the gas has risen by over 20% since pre-industrial era.
- The annual growth rate over the past five years (2017–2021) was 1.2 parts per billion a year and was nearly twice that of the early 2000s (2000–2004).
- Between 1980 and 2022, atmospheric concentrations increased from 301 to 336 parts per billion.
- Agriculture is currently the source of 75% of those emissions.
- Of which approximately 90% comes from the use of synthetic fertilisers and manure on agricultural soils and 10% from manure management.
- Nitrous oxide is currently the most significant ozone-layer depleting substance being emitted to the atmosphere.
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