Senegal's Sources of N2O Emissions
Key Insights
2024 N2O Emissions Profile
In 2024, Senegal's anthropogenic N2O emissions were around 6.1 megatonnes CO2e. Agriculture was by far the largest source, at roughly 5.4 megatonnes CO2e and 87% of emissions, rising by about 0.124 megatonnes CO2e per year over the ten years to 2024. Waste and Other each contributed about 5%, while Energy contributed 2.5%; all three increased over that period. Emissions were therefore strongly concentrated in agriculture.
Historic Agriculture Emissions
Agricultural emissions began at around 0.1 megatonnes CO2e in 1851 and rose gradually to roughly 0.8 by the early 1940s. They then climbed sharply to about 2.9 in 1950 before falling to around 1.9 by 1959. Growth resumed thereafter, accelerating after 2015 and reaching a peak of roughly 5.4 megatonnes CO2e in 2024.
Historic Energy Emissions
Energy emissions started near zero, at around 0.002 megatonnes CO2e in 1851, and remained small through the twentieth century. They rose gradually to about 0.06 megatonnes CO2e by 2005, then increased more quickly. Emissions peaked at roughly 0.16 megatonnes CO2e in 2019 and ended at around 0.15 in 2024.
Historic Waste Emissions
Waste emissions began at around 0.004 megatonnes CO2e in 1851 and increased steadily for more than a century, reaching roughly 0.05 by the late 1960s. Growth continued to around 0.16 in 2006, then strengthened. Waste emissions reached their highest level, about 0.31 megatonnes CO2e, in 2024.
Historic Other Emissions
Other emissions were around 0.006 megatonnes CO2e in 1851 and remained low until the late 1960s. They then rose to a peak of roughly 0.32 megatonnes CO2e in 2011, before declining to about 0.23 in 2015. Emissions recovered afterwards, ending at around 0.31 megatonnes CO2e in 2024.
Background
The chart shows a national breakdown by source of the yearly nitrous oxide (N2O) emissions from human activities and processes, expressed as weight in megatonnes (Mt). Human-induced emissions are the main driver of the increasing atmospheric nitrous oxide that is warming our planet. The sources of human nitrous oxide emissions are
- Agriculture
- Energy
- Industry
- Waste
- Other
Agriculture
Emissions related to agriculture are mainly from the use of synthetic fertilizers and manure management.
Synthetic fertilizer, used for agricultural processes, contains a lot of nitrogen. That nitrogen in the soil reacts and causes considerable N2O emissions. The use of excess fertilizer, meaning more fertilizer than the plants can use to grow, causes even higher relative emissions. Applying the right amount of fertilizer at the right time can reduce N2O emissions. There are many technical solutions to reduce emissions while keeping, or even increasing, agricultural yields.
When manure is left on the field or otherwise managed in dry processes, it emits considerable amounts of nitrous oxide. Manure can be managed by wet processes, which reduces nitrous oxide emissions but increases methane emissions. Some technical solutions focus on modifying the animal feed to reduce the nitrogen in the manure, thereby reducing nitrous oxide emissions.
Energy, Industry, Waste, and Other
All non-agricultural categories together have much lower emissions than agricultural emissions alone.
N2O emissions related to energy are almost all from the combustion of fossil fuels. For example, the combustion of fossil fuels in power plants, cars, and airplanes not only causes CO2 emissions but also emits nitrous oxide (N2O). Any advances to reducing fossil fuel dependency will thus also reduce nitrous oxide emissions.
Most industry-related emissions are from the chemical industry for producing fertilizer, nylon, and similar products. Technologies are available to reduce emissions in these processes.
Nitrous oxide emissions from waste come from, for example, wastewater treatment and landfills.
Wikipedia: Nitrous oxideIPCC: AR6, 5.16 Anthropogenic nitrous oxide (N2O) emissions
Units and Measures
N2O emissions are expressed in the total weight in megatonnes per year. 1 Megatonne is equal to 1 million tonnes.
Wikipedia: MegatonneWikipedia: Global warming potential
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National N2O emissions data through 2024 is from the PRIMAP-hist dataset, which combines several published sources into a historical emissions time series.
The Key Insights paragraph was created using a large language model (LLM) in combination with our data, historic events, and a structured approach for best accuracy by separating the context generation from the interpretation and narrative.
Data Sources
PRIMAP-hist The PRIMAP-hist national historical emissions time series (1750-2024)
Update cycle: Every few monthsDelay: Less than 1 yearCredits: Gütschow, J.; Busch, D.; Pflüger, M. (2025): The PRIMAP-hist national historical emissions time series v2.7 (1750-2024). zenodo. doi:10.5281/zenodo.17090760