How many years of comparable data are there for Poland and Sierra Leone?

35 years are reported by both, from 1990 to 2024.

Where does this data come from?

Statizoid (derived), published as Nitrous oxide (N2O) emissions from Industrial Combustion (Energy) (Mt CO2e), per unit of GDP. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Poland vs Sierra Leone: Nitrous oxide (N2O) emissions from Industrial Combustion (Energy) (Mt)

Poland

0 Mt CO2e per US$ of GDP

in 2024

Sierra Leone

0 Mt CO2e per US$ of GDP

in 2024

Poland rank

72nd

Sierra Leone rank

71st

Nitrous oxide (N2O) emissions from Industrial Combustion (Energy) (Mt) over time

Poland
Sierra Leone

How they compare

Sierra Leone currently reports 0 Mt CO2e per US$ of GDP against 0 Mt CO2e per US$ of GDP in Poland, a difference of 0 Mt CO2e per US$ of GDP.

The two have swapped places 6 times across 35 shared years of data; in 1990 it was Sierra Leone ahead.

Poland ranks 72nd and Sierra Leone ranks 71st of 191 countries.

Poland has averaged higher in every one of the 4 decades both report.

Head to head by decade

Decade	Poland	Sierra Leone	Difference	Ahead
1990s	0 Mt CO2e per US$ of GDP	0 Mt CO2e per US$ of GDP	0 Mt CO2e per US$ of GDP	Poland
2000s	0 Mt CO2e per US$ of GDP	0 Mt CO2e per US$ of GDP	0 Mt CO2e per US$ of GDP	Poland
2010s	0 Mt CO2e per US$ of GDP	0 Mt CO2e per US$ of GDP	0 Mt CO2e per US$ of GDP	Poland
2020s	0 Mt CO2e per US$ of GDP	0 Mt CO2e per US$ of GDP	0 Mt CO2e per US$ of GDP	Poland

Averages of every year both report within each decade.

Frequently asked questions

Which has higher nitrous oxide (n2o) emissions from industrial combustion (energy) (mt), Poland or Sierra Leone?: Sierra Leone, at 0 Mt CO2e per US$ of GDP against 0 Mt CO2e per US$ of GDP in Poland as of 2024.
What is the difference in nitrous oxide (n2o) emissions from industrial combustion (energy) (mt) between Poland and Sierra Leone?: 0 Mt CO2e per US$ of GDP, with Sierra Leone ahead.
How many years of comparable data are there for Poland and Sierra Leone?: 35 years are reported by both, from 1990 to 2024.
How do Poland and Sierra Leone rank globally for nitrous oxide (n2o) emissions from industrial combustion (energy) (mt)?: Poland ranks 72nd and Sierra Leone ranks 71st of 191 countries.
Where does this data come from?: Statizoid (derived), published as Nitrous oxide (N2O) emissions from Industrial Combustion (Energy) (Mt CO2e), per unit of GDP. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Poland vs Sierra Leone: Nitrous oxide (N2O) emissions from Industrial Combustion (Energy) (Mt). Statizoid, drawing on Statizoid (derived). Retrieved 19 September 2026, from https://environment.statizoid.com/compare/nitrous-oxide-n2o-emissions-from-industrial-combustion-energy-mt-co2e-per-unit-of-gdp/poland/sierra-leone/

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<a href="https://environment.statizoid.com/compare/nitrous-oxide-n2o-emissions-from-industrial-combustion-energy-mt-co2e-per-unit-of-gdp/poland/sierra-leone/">Poland vs Sierra Leone: Nitrous oxide (N2O) emissions from Industrial Combustion (Energy) (Mt)</a> — Statizoid

About this data

Indicator: Nitrous oxide (N2O) emissions from Industrial Combustion (Energy) (Mt CO2e), per unit of GDP
Unit: Mt CO2e per US$ of GDP
Source: Statizoid (derived)
Licence: Derived by Statizoid from the sources named on the page
Coverage: 238 places, 12,139 data points, 1970–2024
Last refreshed: 19 September 2026

Nitrous oxide (N2O) emissions from Industrial Combustion (Energy) (Mt CO2e) divided by GDP (current US$), matched on country and year. Neither publisher issues this ratio as a series; it is computed here from both.