How many years of comparable data are there for Sri Lanka and Tonga?

50 years are reported by both, from 1975 to 2024.

Where does this data come from?

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

Sri Lanka vs Tonga: Nitrous oxide (N2O) emissions from Transport (Energy) (Mt CO2e), per

Sri Lanka

0 Mt CO2e per US$ of GDP

in 2024

Tonga

0 Mt CO2e per US$ of GDP

in 2024

Sri Lanka rank

59th

Tonga rank

61st

Nitrous oxide (N2O) emissions from Transport (Energy) (Mt CO2e), per over time

Sri Lanka
Tonga

How they compare

Sri Lanka currently reports 0 Mt CO2e per US$ of GDP against 0 Mt CO2e per US$ of GDP in Tonga, a difference of 0 Mt CO2e per US$ of GDP.

The two have swapped places 6 times across 50 shared years of data; in 1975 it was Sri Lanka ahead.

Sri Lanka ranks 59th and Tonga ranks 61st of 191 countries.

Across the 6 decades both report, Sri Lanka averaged higher in 5 and Tonga in 1.

Head to head by decade

Decade	Sri Lanka	Tonga	Difference	Ahead
1970s	0 Mt CO2e per US$ of GDP	0 Mt CO2e per US$ of GDP	0 Mt CO2e per US$ of GDP	Sri Lanka
1980s	0 Mt CO2e per US$ of GDP	0 Mt CO2e per US$ of GDP	0 Mt CO2e per US$ of GDP	Sri Lanka
1990s	0 Mt CO2e per US$ of GDP	0 Mt CO2e per US$ of GDP	0 Mt CO2e per US$ of GDP	Sri Lanka
2000s	0 Mt CO2e per US$ of GDP	0 Mt CO2e per US$ of GDP	0 Mt CO2e per US$ of GDP	Sri Lanka
2010s	0 Mt CO2e per US$ of GDP	0 Mt CO2e per US$ of GDP	0 Mt CO2e per US$ of GDP	Sri Lanka
2020s	0 Mt CO2e per US$ of GDP	0 Mt CO2e per US$ of GDP	0 Mt CO2e per US$ of GDP	Tonga

Averages of every year both report within each decade.

Frequently asked questions

Which has higher nitrous oxide (n2o) emissions from transport (energy) (mt co2e), per, Sri Lanka or Tonga?: Sri Lanka, at 0 Mt CO2e per US$ of GDP against 0 Mt CO2e per US$ of GDP in Tonga as of 2024.
What is the difference in nitrous oxide (n2o) emissions from transport (energy) (mt co2e), per between Sri Lanka and Tonga?: 0 Mt CO2e per US$ of GDP, with Sri Lanka ahead.
How many years of comparable data are there for Sri Lanka and Tonga?: 50 years are reported by both, from 1975 to 2024.
How do Sri Lanka and Tonga rank globally for nitrous oxide (n2o) emissions from transport (energy) (mt co2e), per?: Sri Lanka ranks 59th and Tonga ranks 61st of 191 countries.
Where does this data come from?: Statizoid (derived), published as Nitrous oxide (N2O) emissions from Transport (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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Sri Lanka vs Tonga: Nitrous oxide (N2O) emissions from Transport (Energy) (Mt CO2e), per. Statizoid, drawing on Statizoid (derived). Retrieved 18 September 2026, from https://environment.statizoid.com/compare/nitrous-oxide-n2o-emissions-from-transport-energy-mt-co2e-per-unit-of-gdp/sri-lanka/tonga/

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About this data

Indicator: Nitrous oxide (N2O) emissions from Transport (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: 18 September 2026

Nitrous oxide (N2O) emissions from Transport (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.