Finland

Indicators

Excess nitrogen per hectare of cropland single year 65.7 kg per hectare (2009) —

Excess nitrogen from croplands single year 132 kt (2009) —

Share of global excess nitrogen from croplands single year 0.176 % (2009) —

Amount of N added to cropland through biological fixation 6.18 kt (2023) +1836%

Value 6.18 kt (2023)

Change since 1961 +1836.4%

Amount of N added to cropland through biological fixation, per hectare of cropland 2.75 kg/ha (2023) +2195%

Value 2.75 kg/ha (2023)

Change since 1961 +2195.2%

N balance in agroecosystems 99.4 kt (2019) -48%

Value 99.4 kt (2019)

Change since 1985 -48.2%

Which countries overapplied nitrogen without gains in crop yields? single year 0 % (2020) —

N fertilizer consumption per capita 5.59 kg/person (2023) -67%

Value 5.59 kg/person (2023)

Change since 1961 -67.3%

Nitrogen applied from organic fertilizers (excluding livestock manure) 2.19 kt (2019) +430%

Value 2.19 kt (2019)

Change since 1985 +429.7%

Nitrogen applied from inorganic fertilizers 147 kt (2019) -25%

Value 147 kt (2019)

Change since 1985 -25.2%

Nitrogen produced from cattle manure 63.9 kt (2019) -23%

Value 63.9 kt (2019)

Change since 1985 -22.5%

Nitrogen produced from pig manure 13.1 kt (2019) -14%

Value 13.1 kt (2019)

Change since 1985 -14.0%

Total nitrogen fertilizer production 196 t (2020) -23%

Value 196 t (2020)

Change since 2000 -22.6%

Definition (source: OECD): From the online data portal FAOSTAT maintained by the Statistics Division of the Food and Agriculture Organization of the United Nations (FAO) : 'Nutrient nitrogen' is defined as total nitrogen (N) from all fertilizer products. The 'Fertilizers by Nutrient' domain contains information on agricultural use, production, and trade of chemical and mineral fertilizers, in tonnes of nutrient, for the three main plant nutrients: nitrogen (N), phosphorus (expressed as P2O5) and potassium (expressed as K2O). The main data source for production and agricultural use is the FAOSTAT Fertilizers questionnaire, complemented with national publications when available. Agricultural use of fertilizers refers to the use for crops, livestock, forestry, fisheries and aquaculture, excluding use for animal feed. Industrial uses are excluded, to the extent allowed by data availability. Tonnes of nutrient nitrogen are calculated using conversion factors applied to volumes of nitrogenous fertilizers. For more information, please see: http://fenixservices.fao.org/faostat/static/documents/RFN/RFN_EN_README.pdf

Citation: OECD (2024). "Nutrient nitrogen production," Africa's Development Dynamics (AfDD): Table 23 - Ecological sustainability, OECD Data Explorer, https://data-explorer.oecd.org/vis?lc=en&tm=nitrogen&pg=0&snb=15&df[ds]=dsDisseminateFinalDMZ&df[id]=DSD_AFDD_STAT_ANNEX%40DF_TAB23&df[ag]=OECD.DEV.EMEA&df[vs]=1.0&dq=......A&pd=,&to[TIME_PERIOD]=false&vw=ov

Total nitrogen fertilizer production 0 t (2023) -100%

Value 0 t (2023)

Change since 1961 -100.0%

Nitrogen fertilizer consumption per hectare of arable land 87.2 kg/ha (2023) -4%

Value 87.2 kg/ha (2023)

Change since 1961 -3.9%

Total nitrogen inputs to crops single year 205 kt (2009) —

Nitrogen inputs per hectare of cropland single year 102 kg/ha (2009) —

Nitrogen fertilizer use per hectare of cropland 43.8 kg/ha (2023) +182%

Value 43.8 kg/ha (2023)

Change since 1961 +182.1%

Total N fertilizer production 105 kt (2022) +105%

Value 105 kt (2022)

Change since 1961 +105.2%

N fertilizer imports 56.7 kt (2023) +198%

Value 56.7 kt (2023)

Change since 1961 +197.8%

N fertilizer exports 31.3 kt (2023) +787%

Value 31.3 kt (2023)

Change since 1966 +786.8%

N fertilizer use per capita 24.7 kg/ person (2023) +86%

Value 24.7 kg/ person (2023)

Change since 1961 +86.4%

Agricultural use of N fertilizer 138 kt (2023) +134%

Value 138 kt (2023)

Change since 1961 +134.0%

N fertilizers use per area of cropland 43 kg/ha (2023) +177%

Value 43 kg/ha (2023)

Change since 1961 +176.9%

Amount of N added to cropland through synthetic fertilizers, per hectare of cropland 40.5 kg/ha (2023) +295%

Value 40.5 kg/ha (2023)

Change since 1961 +295.1%

Amount of N added to cropland through animal manure 30.7 kt (2023) -54%

Value 30.7 kt (2023)

Change since 1961 -53.8%

Amount of N added to cropland through animal manure, per hectare of cropland 13.6 kg/ha (2023) -45%

Value 13.6 kg/ha (2023)

Change since 1961 -45.3%

N fertilizer use per value of agricultural production 47.4 g per $ (2023) +122%

Value 47.4 g per $ (2023)

Change since 1961 +122.2%

Agricultural use of nutrient nitrogen 139 t (2020) -17%

Value 139 t (2020)

Change since 2000 -16.6%

Definition (source: OECD): From the online data portal FAOSTAT maintained by the Statistics Division of the Food and Agriculture Organization of the United Nations (FAO) : 'Nutrient nitrogen' is defined as total nitrogen (N) from all fertilizer products. The 'Fertilizers by Nutrient' domain contains information on agricultural use, production, and trade of chemical and mineral fertilizers, in tonnes of nutrient, for the three main plant nutrients: nitrogen (N), phosphorus (expressed as P2O5) and potassium (expressed as K2O). The main data source for production and agricultural use is the FAOSTAT Fertilizers questionnaire, complemented with national publications when available. Agricultural use of fertilizers refers to the use for crops, livestock, forestry, fisheries and aquaculture, excluding use for animal feed. Industrial uses are excluded, to the extent allowed by data availability. Tonnes of nutrient nitrogen are calculated using conversion factors applied to volumes of nitrogenous fertilizers. For more information, please see: https://fenixservices.fao.org/faostat/static/documents/RFN/RFN_EN_README.pdf

Citation: OECD (2024). "Agricultural use of nutrient nitrogen," Africa's Development Dynamics (AfDD): Table 23 - Ecological sustainability, OECD Data Explorer, https://data-explorer.oecd.org/vis?lc=en&tm=nitrogen&pg=0&snb=15&df[ds]=dsDisseminateFinalDMZ&df[id]=DSD_AFDD_STAT_ANNEX%40DF_TAB23&df[ag]=OECD.DEV.EMEA&df[vs]=1.0&dq=......A&pd=,&to[TIME_PERIOD]=false&vw=ov

Agricultural use of ammonia (anhydrous) 0 t (2015) —

Value 0 t (2015)

Change since 2012 —

Export of ammonia (anhydrous) 0.48 t (2023) -100%

Value 0.48 t (2023)

Change since 2002 -100.0%

Export value of ammonia (anhydrous) 1.19 k$ (2023) -100%

Value 1.19 k$ (2023)

Change since 2002 -99.9%

Import of ammonia (anhydrous) 345 kt (2013) +70%

Value 345 kt (2013)

Change since 2002 +70.0%

Import value of ammonia (anhydrous) 214 M$ (2013) +627%

Value 214 M$ (2013)

Change since 2002 +626.9%

Export of ammonium nitrate 8.57 kt (2024) +85713900%

Value 8.57 kt (2024)

Change since 2002 +85713900.0%

Export value of ammonium nitrate 4.34 M$ (2024) +10843675%

Value 4.34 M$ (2024)

Change since 2002 +10843675.0%

Import of ammonium nitrate 17.5 kt (2024) +44%

Value 17.5 kt (2024)

Change since 2002 +44.4%

Import value of ammonium nitrate 8.71 M$ (2024) +211%

Value 8.71 M$ (2024)

Change since 2002 +211.4%

Export of ammonium sulphate 91.8 kt (2024) -4%

Value 91.8 kt (2024)

Change since 2002 -4.0%

Export value of ammonium sulphate 14.2 M$ (2024) +429%

Value 14.2 M$ (2024)

Change since 2002 +429.3%

Import of ammonium sulphate (Tonnes) 17.2 kt (2013) -10%

Value 17.2 kt (2013)

Change since 2002 -9.7%

Import value of ammonium sulphate (1000 USD) 5.09 M$ (2013) +366%

Value 5.09 M$ (2013)

Change since 2002 +366.4%

Agricultural use of calcium ammonium nitrate and other mixtures with calcium carbonate single year 42.5 kt (2011) —

Export of calcium ammonium nitrate and other mixtures with calcium carbonate 650 t (2024) -99%

Value 650 t (2024)

Change since 2002 -98.9%

Export value of calcium ammonium nitrate and other mixtures with calcium carbonate 248 k$ (2024) -95%

Value 248 k$ (2024)

Change since 2002 -94.7%

Import of calcium ammonium nitrate and other mixtures with calcium carbonate 40.2 kt (2024) +2266%

Value 40.2 kt (2024)

Change since 2002 +2265.6%

Import value of calcium ammonium nitrate and other mixtures with calcium carbonate 11.5 M$ (2024) +5123%

Value 11.5 M$ (2024)

Change since 2002 +5122.6%

Amount of N added to cropland through synthetic fertilizers 91.1 kt N (2023) +233%

Value 91.1 kt N (2023)

Change since 1961 +233.4%

Export of fertilizers n.e.c. 38.6 kt (2024) +62%

Value 38.6 kt (2024)

Change since 2002 +62.0%

Export value of fertilizers n.e.c. 13.8 M$ (2024) +256%

Value 13.8 M$ (2024)

Change since 2002 +256.3%

Import of fertilizers n.e.c. 1.86 kt (2024) -92%

Value 1.86 kt (2024)

Change since 2002 -91.8%

Import value of fertilizers n.e.c. 3.64 M$ (2024) +31%

Value 3.64 M$ (2024)

Change since 2002 +31.0%

Agricultural use of NPK fertilizers 267 t (2011) -13%

Value 267 t (2011)

Change since 2006 -13.0%

Export of NPK fertilizers 469 kt (2013) +51%

Value 469 kt (2013)

Change since 2002 +51.2%

Export value of NPK fertilizers 469 M$ (2013) +51%

Value 469 M$ (2013)

Change since 2002 +51.2%

Import of NPK fertilizers 68.7 kt (2024) +136%

Value 68.7 kt (2024)

Change since 2002 +136.1%

Import value of NPK fertilizers 26.6 M$ (2024) +413%

Value 26.6 M$ (2024)

Change since 2002 +413.3%

Production of NPK fertilizers 1.09 Mt (2008) +12%

Value 1.09 Mt (2008)

Change since 2007 +12.3%

Export of other nitrogenous fertilizers 15.8 kt (2024) +330%

Value 15.8 kt (2024)

Change since 2002 +330.1%

Export value of other nitrogenous fertilizers 3.66 M$ (2024) +174%

Value 3.66 M$ (2024)

Change since 2002 +173.5%

Import of other nitrogenous fertilizers 4.66 kt (2024) -6%

Value 4.66 kt (2024)

Change since 2002 -6.4%

Import value of other nitrogenous fertilizers 2.72 M$ (2024) +79%

Value 2.72 M$ (2024)

Change since 2002 +79.0%

Agriculture use of urea 31.8 kt (2011) +1%

Value 31.8 kt (2011)

Change since 2009 +1.5%

Agriculture use of urea and ammonium nitrate solutions 122 t (2011) +249%

Value 122 t (2011)

Change since 2009 +248.6%

Export of urea and ammonium nitrate solutions single year 0 t (2021) —

Export value of urea and ammonium nitrate solutions single year 0 $ (2021) —

Import value of urea and ammonium nitrate solutions 4.4 k$ (2024) -72%

Value 4.4 k$ (2024)

Change since 2009 -71.6%

Import of urea and ammonium nitrate solutions 7.92 t (2024) -77%

Value 7.92 t (2024)

Change since 2009 -77.4%

Export of urea 2.59 kt (2024) +53215%

Value 2.59 kt (2024)

Change since 2002 +53215.0%

Export value of urea 1.15 M$ (2024) +204371%

Value 1.15 M$ (2024)

Change since 2002 +204371.4%

Import of urea 60.5 kt (2024) -0%

Value 60.5 kt (2024)

Change since 2002 -0.2%

Import value of urea 25.9 M$ (2024) +294%

Value 25.9 M$ (2024)

Change since 2002 +293.7%

N lost from croplands through volatilisation 38.7 kt (2023) +20%

Value 38.7 kt (2023)

Change since 1961 +19.8%

N added onto cropland from atmospheric deposition 5.44 kt (2023) -25%

Value 5.44 kt (2023)

Change since 1961 -25.1%

N added onto cropland from atmospheric deposition, per hectare of cropland 2.42 kg/ha (2023) -11%

Value 2.42 kg/ha (2023)

Change since 1961 -11.3%

N lost from croplands through leaching 15,979 kg/ha and ton (2023) -8%

Value 15,979 kg/ha and ton (2023)

Change since 1961 -8.3%

N lost from croplands through leaching, per hectare of cropland 7.11 kg/ha (2023) +9%

Value 7.11 kg/ha (2023)

Change since 1961 +8.7%

N lost from croplands through volatilisation, per hectare of cropland (kg/ha) 17.2 kg/ha (2023) +42%

Value 17.2 kg/ha (2023)

Change since 1961 +42.0%

Amount of N removed from cropland through crop harvesting 68 kt (2023) +52%

Value 68 kt (2023)

Change since 1961 +52.2%

Amount of N removed from cropland through crop residue 14.2 kt (2023) -16%

Value 14.2 kt (2023)

Change since 1961 -15.7%

Amount of N removed from cropland through crop harvesting, per hectare of cropland 30.2 kg/ha (2023) +80%

Value 30.2 kg/ha (2023)

Change since 1961 +80.5%

Amount of N removed from cropland through crop residue, per hectare of cropland 6.31 kg/ha (2023) -0%

Value 6.31 kg/ha (2023)

Change since 1961 -0.1%

Nitrogen use efficiency 57.1 % (2014) +65%

Value 57.1 % (2014)

Change since 1961 +65.4%

Nitrate concentration in freshwater 5.19 mg/L (2021) -4%

Value 5.19 mg/L (2021)

Change since 2012 -4.2%

Share of all nitrate emissions to surface water attributable to agriculture 52 % (2015) +18%

Value 52 % (2015)

Change since 1995 +18.2%

Percentage of all nitrate emissions to coastal water attributable to agriculture 34 % (2010) +10%

Value 34 % (2010)

Change since 1990 +9.7%

Share of monitoring sites located in agricultural areas that exceed recommended drinking water limits for nitrate, for ground water 1 % (2015) -67%

Value 1 % (2015)

Change since 2000 -66.7%

Percentage of monitoring sites located in agricultural areas that exceed recommended drinking water limits for nitrate, for surface water 0 % (2015) —

Value 0 % (2015)

Change since 2000 —

Nitrous oxide (N₂O) Emissions from agriculture 3.74 Mt CO₂e (2024) +12%

Value 3.74 Mt CO₂e (2024)

Change since 1970 +12.3%

Nitrous oxide (N₂O) emissions from croplands 6.78 Mt CO₂e (2021) +10%

Value 6.78 Mt CO₂e (2021)

Change since 1990 +10.3%

Nitrous oxide (N₂O) emissions from forestlands 1.68 Gt CO₂e (2021) +18%

Value 1.68 Gt CO₂e (2021)

Change since 1990 +18.5%

Ammonia (NH₃) emissions from agriculture 27.8 kt (2021) -16%

Value 27.8 kt (2021)

Change since 1990 -15.5%

Nitrous oxide (N₂O) emissions from agriculture 4,170 Gt CO₂e (2023) -3%

Value 4,170 Gt CO₂e (2023)

Change since 1990 -3.5%

Nitrous oxide (N₂O) emissions from agriculture per capita 744 t CO₂e/person (2023) -14%

Value 744 t CO₂e/person (2023)

Change since 1990 -14.1%

Direct N₂O emissions from crop residues, for barley 0.209 t (2023) +167%

Value 0.209 t (2023)

Change since 1961 +167.4%

Direct N₂O emissions from crop residues, for oats 0.167 t (2023) -6%

Value 0.167 t (2023)

Change since 1961 -6.0%

Direct N₂O emissions from crop residues, for potatoes 0.0134 t (2023) -68%

Value 0.0134 t (2023)

Change since 1961 -68.4%

Direct N₂O emissions from crop residues, for rye 0.0153 t (2023) -43%

Value 0.0153 t (2023)

Change since 1961 -42.9%

Direct N₂O emissions from crop residues, for wheat 0.152 t (2023) +53%

Value 0.152 t (2023)

Change since 1961 +53.1%

N₂O emissions from burning crop residues, for maize single year 0 t (2020) —

N₂O emissions from burning crop residues, for rice 0 t (2023) —

Value 0 t (2023)

Change since 2018 —

N₂O emissions from burning crop residues, for wheat 0.0064 t (2023) -3%

Value 0.0064 t (2023)

Change since 1961 -3.0%

Indirect N₂O emissions from crop residues, for barley 0.0471 t (2023) +168%

Value 0.0471 t (2023)

Change since 1961 +167.6%

Indirect N₂O emissions from crop residues, for oats 0.0377 t (2023) -6%

Value 0.0377 t (2023)

Change since 1961 -6.0%

Indirect N₂O emissions from crop residues, for potatoes 0.003 t (2023) -69%

Value 0.003 t (2023)

Change since 1961 -68.8%

Indirect N₂O emissions from crop residues, for rye 0.0035 t (2023) -42%

Value 0.0035 t (2023)

Change since 1961 -41.7%

Indirect N₂O emissions from crop residues, for wheat 0.0342 t (2023) +53%

Value 0.0342 t (2023)

Change since 1961 +53.4%

N₂O emissions from crop residues, for barley 256 t (2023) +167%

Value 256 t (2023)

Change since 1961 +167.4%

N₂O emissions from crop residues, for oats 205 t (2023) -6%

Value 205 t (2023)

Change since 1961 -6.0%

N₂O emissions from crop residues, for potatoes (kt) 16.4 t (2023) -68%

Value 16.4 t (2023)

Change since 1961 -68.5%

N₂O emissions from crop residues, for rye 18.8 t (2023) -43%

Value 18.8 t (2023)

Change since 1961 -42.9%

N₂O emissions from crop residues, for wheat 186 t (2023) +53%

Value 186 t (2023)

Change since 1961 +52.9%

Amount of N added to cropland through planting seeds 5.52 kt (2023) +1%

Value 5.52 kt (2023)

Change since 1961 +0.5%

N content from crop residues, for barley 13.3 kt (2023) +168%

Value 13.3 kt (2023)

Change since 1961 +167.6%

N content from crop residues, for potatoes 853 t (2023) -68%

Value 853 t (2023)

Change since 1961 -68.4%

N content from crop residues, for rye 976 t (2023) -43%

Value 976 t (2023)

Change since 1961 -42.8%

N content from crop residues, for wheat 9.67 kt (2023) +53%

Value 9.67 kt (2023)

Change since 1961 +53.0%

Amount of N added to cropland through planting seeds, per hectare of cropland 2.45 kg/ha (2023) +19%

Value 2.45 kg/ha (2023)

Change since 1961 +19.1%

Total nitrous oxide (N₂O) emissions, excluding LULUCF 6.11 Mt CO₂e (2024) +8%

Value 6.11 Mt CO₂e (2024)

Change since 1970 +8.4%

Total nitrous oxide (N₂O) emissions, excluding LULUCF (% change from 1990) 1.96 % change (2024) +205%

Value 1.96 % change (2024)

Change since 1991 +205.0%

Ammonia (NH₃) emissions 31 kt (2021) -13%

Value 31 kt (2021)

Change since 1990 -13.5%

Total nitrous oxide (N₂O) emissions, excluding LULUCF 5.94 Gt CO₂e (2023) -20%

Value 5.94 Gt CO₂e (2023)

Change since 1990 -20.4%

Total man-made nitrogen oxides (NOₓ) emissions 85.9 t (2023) -71%

Value 85.9 t (2023)

Change since 1990 -71.5%

Total man-made ammonia (NH₃) emissions 30.2 t (2023) -27%

Value 30.2 t (2023)

Change since 1990 -27.1%

N₂O emissions from all sectors 6,373 Gt CO₂e (2024) +1293%

Value 6,373 Gt CO₂e (2024)

Change since 1850 +1293.1%

Share of global nitrous oxide (N₂O) emissions 0.217 % (2024) -32%

Value 0.217 % (2024)

Change since 1850 -31.8%

Definition (source: Our World in Data): A dataset describing the global warming response to national emissions CO2, CH4 and N2O from fossil and land use sources during 1851-2024. National CO2 emissions data are collated from the Global Carbon Project (Andrew and Peters, 2025; Friedlingstein et al., 2025). National CH4 and N2O emissions data are collated from PRIMAP-hist (HISTTP) (Gütschow et al., 2024). We construct a time series of cumulative CO2-equivalent emissions for each country, gas, and emissions source (fossil or land use). Emissions of CH4 and N2O emissions are related to cumulative CO2-equivalent emissions using the Global Warming Potential (GWP*) approach, with best-estimates of the coefficients taken from the IPCC AR6 (Forster et al., 2021). Warming in response to cumulative CO2-equivalent emissions is estimated using the transient climate response to cumulative carbon emissions (TCRE) approach, with best-estimate value of TCRE taken from the IPCC AR6 (Forster et al., 2021, Canadell et al., 2021). 'Warming' is specifically the change in global mean surface temperature (GMST). The data files provide emissions, cumulative emissions and the GMST response by country, gas (CO2, CH4, N2O or 3-GHG total) and source (fossil emissions, land use emissions or the total).

Citation: Jones et al. (2025) – with major processing by Our World in Data. “Share of global nitrous oxide emissions” [dataset]. Jones et al., “National contributions to climate change 2025.1” [original data]. Retrieved September 21, 2026 from https://archive.ourworldindata.org/20260910-011030/grapher/share-nitrous-oxide-emissions.html (archived on September 10, 2026).

Ammonium concentration in freshwater 0.0211 mg/L (2021) -54%

Value 0.0211 mg/L (2021)

Change since 1992 -53.6%

N₂O from all sectors per capita single year 0.176 Mt CO2e/ person (2009) —

Nitrous oxide (N₂O) Emissions from buildings (Energy) 169 kt CO₂e (2024) -49%

Value 169 kt CO₂e (2024)

Change since 1970 -49.2%

Nitrous oxide (N₂O) emissions from fugitive emissions (Energy) 1.4 kt CO₂e (2024) +133%

Value 1.4 kt CO₂e (2024)

Change since 1970 +133.3%

Nitrous oxide (N₂O) emissions from industrial combustion (Energy) 189 kt CO₂e (2024) +417%

Value 189 kt CO₂e (2024)

Change since 1970 +416.7%

Nitrous oxide (N₂O) emissions from industrial processes 1.26 Mt CO₂e (2024) -26%

Value 1.26 Mt CO₂e (2024)

Change since 1970 -25.7%

Nitrous oxide (N₂O) emissions from power industry (Energy) 472 kt CO₂e (2024) +661%

Value 472 kt CO₂e (2024)

Change since 1970 +660.5%

Nitrous oxide (N₂O) emissions from transport (Energy) 90.7 kt CO₂e (2024) +3%

Value 90.7 kt CO₂e (2024)

Change since 1970 +2.7%

Nitrous oxide (N₂O) emissions from waste 191 kt CO₂e (2024) +100%

Value 191 kt CO₂e (2024)

Change since 1970 +100.0%

Population (total) 5.65 M (2025) +27%

Value 5.65 M (2025)

Change since 1960 +27.5%

GDP (current US$) 317 B$ (2025) +5905%

Value 317 B$ (2025)

Change since 1960 +5905.1%

GDP per capita (current US$) 56.1 k$ (2025) +4611%

Value 56.1 k$ (2025)

Change since 1960 +4611.0%

Cropland area (% of land area) 0.0164 % of land area (2023) +401%

Value 0.0164 % of land area (2023)

Change since 1961 +401.0%

Number of Public Policies (All Years) single year 14 policies (2018) —

Number of Public Policies Enacted (by Year) 0 policies (2018) —

Value 0 policies (2018)

Change since 1905 —

Agriculture, forestry, and fishing, value added (% of GDP) 2.61 % of GDP (2025) -73%

Value 2.61 % of GDP (2025)

Change since 1975 -73.4%

Cropland area (hectares) 2,249,000 ha (2023) -16%

Value 2,249,000 ha (2023)

Change since 1961 -15.6%

Socio-economic Information

N₂O Emissions by Sector

Indicators

Nitrogen-Related Policies & Regulations