How many years of comparable data are there for Eswatini and Portugal?

54 years are reported by both, from 1970 to 2023.

Where does this data come from?

Statizoid (derived), published as Methane (CH4) emissions from Transport (Energy) (Mt CO2e), per square kilometre. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Eswatini vs Portugal: Methane (CH4) emissions from Transport (Energy) (Mt CO2e), per square

Eswatini

0 Mt CO2e per square kilometre

in 2023

Portugal

0 Mt CO2e per square kilometre

in 2023

Eswatini rank

79th

Portugal rank

82nd

Methane (CH4) emissions from Transport (Energy) (Mt CO2e), per square over time

Eswatini
Portugal

How they compare

Eswatini currently reports 0 Mt CO2e per square kilometre against 0 Mt CO2e per square kilometre in Portugal, a difference of 0 Mt CO2e per square kilometre.

That makes Eswatini's figure about 1.1 times Portugal's.

The two have swapped places 1 time across 54 shared years of data; in 1970 it was Portugal ahead.

Eswatini ranks 79th and Portugal ranks 82nd of 194 countries.

Across the 6 decades both report, Eswatini averaged higher in 1 and Portugal in 5.

Head to head by decade

Decade	Eswatini	Portugal	Difference	Ahead
1970s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	Portugal
1980s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	Portugal
1990s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	Portugal
2000s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	Portugal
2010s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	Portugal
2020s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	Eswatini

Averages of every year both report within each decade.

Frequently asked questions

Which has higher methane (ch4) emissions from transport (energy) (mt co2e), per square, Eswatini or Portugal?: Eswatini, at 0 Mt CO2e per square kilometre against 0 Mt CO2e per square kilometre in Portugal as of 2023.
What is the difference in methane (ch4) emissions from transport (energy) (mt co2e), per square between Eswatini and Portugal?: 0 Mt CO2e per square kilometre, with Eswatini ahead.
How many years of comparable data are there for Eswatini and Portugal?: 54 years are reported by both, from 1970 to 2023.
How do Eswatini and Portugal rank globally for methane (ch4) emissions from transport (energy) (mt co2e), per square?: Eswatini ranks 79th and Portugal ranks 82nd of 194 countries.
Where does this data come from?: Statizoid (derived), published as Methane (CH4) emissions from Transport (Energy) (Mt CO2e), per square kilometre. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Eswatini vs Portugal: Methane (CH4) emissions from Transport (Energy) (Mt CO2e), per square. Statizoid, drawing on Statizoid (derived). Retrieved 21 September 2026, from https://environment.statizoid.com/compare/methane-ch4-emissions-from-transport-energy-mt-co2e-per-square-kilometre/eswatini/portugal/

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<a href="https://environment.statizoid.com/compare/methane-ch4-emissions-from-transport-energy-mt-co2e-per-square-kilometre/eswatini/portugal/">Eswatini vs Portugal: Methane (CH4) emissions from Transport (Energy) (Mt CO2e), per square</a> — Statizoid

About this data

Indicator: Methane (CH4) emissions from Transport (Energy) (Mt CO2e), per square kilometre
Unit: Mt CO2e per square kilometre
Source: Statizoid (derived)
Licence: Derived by Statizoid from the sources named on the page
Coverage: 241 places, 12,381 data points, 1970–2023
Last refreshed: 21 September 2026

Methane (CH4) emissions from Transport (Energy) (Mt CO2e) divided by Land area (sq. km), matched on country and year. Neither publisher issues this ratio as a series; it is computed here from both.