Saint Lucia's Sources of N2O Emissions
Key Insights
Agriculture Dominates The Picture
Across Saint Lucia, agriculture has long driven most nitrous oxide emissions, accounting for around three-quarters of the total. From the post‑war era to the early 1990s, emissions rose from negligible levels to roughly 0.02 Mt. Since the mid‑1990s, they have eased slightly and remained fairly steady, generally hovering around 0.01-0.02 Mt through the 2020s.
Waste And Other Gradually Build
Non‑agricultural sources are smaller but have edged upward over time. Waste increased from near zero in the 1970s to about 0.003 Mt recently, varying within a narrow band. "Other" sources stayed minimal until the 1980s, then climbed gradually, reaching just under 0.004 Mt by the mid‑2020s.
Energy Remains A Minor Source
Energy‑related emissions were negligible for much of the historical record and have only crept up since the 1980s, remaining around or below 0.002 Mt in recent years-well below the main categories. Industry is effectively absent in this profile.
Outlook And Priorities Ahead
Overall N2O appears broadly stable since the mid‑1990s: a gentle decline in agriculture offset by modest rises in waste and other. To reduce total emissions, the priority is to deepen the slow downward trend in agriculture while reversing the gradual increases in waste and other, which together form a meaningful share alongside the dominant agricultural source.
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
About the Data
The last available year in all the emission datasets is 2023. N2O emissions come from the PRIMAP-Hist dataset. It is a rich dataset that combines several published sources to create a historical emissions time series for various greenhouse gases.
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 (1750-2023)
Update cycle: Every few monthsDelay: Less than 1 yearCredits: Gütschow, Johannes; Busch, Daniel; Pflüger, Mika (2024): The PRIMAP-hist national historical emissions time series (1750-2023) v2.6. Zenodo.