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

59 years are reported by both, from 1961 to 2019.

Where does this data come from?

Statizoid (derived), published as Emission Totals - Emissions (CO2eq) (AR5) - Enteric Fermentation, per square kilometre. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Portugal vs Viet Nam: Emission Totals - Emissions (CO2eq) (AR5) - Enteric Fermentation, per

Portugal

0.0404 units per square kilometre

in 2019

Viet Nam

0.0408 units per square kilometre

in 2019

Portugal rank

52nd

Viet Nam rank

50th

Emission Totals - Emissions (CO2eq) (AR5) - Enteric Fermentation, per over time

Portugal
Viet Nam

How they compare

Viet Nam currently reports 0.0408 units per square kilometre against 0.0404 units per square kilometre in Portugal, a difference of 0.0004 units per square kilometre.

The two have swapped places 3 times across 59 shared years of data; in 1961 it was Portugal ahead.

Portugal ranks 52nd and Viet Nam ranks 50th of 189 countries.

Across the 6 decades both report, Portugal averaged higher in 4 and Viet Nam in 2.

Head to head by decade

Decade	Portugal	Viet Nam	Difference	Ahead
1960s	0.0401 units per square kilometre	0.0194 units per square kilometre	0.0207 units per square kilometre	Portugal
1970s	0.0397 units per square kilometre	0.0183 units per square kilometre	0.0215 units per square kilometre	Portugal
1980s	0.043 units per square kilometre	0.0236 units per square kilometre	0.0194 units per square kilometre	Portugal
1990s	0.0421 units per square kilometre	0.0301 units per square kilometre	0.012 units per square kilometre	Portugal
2000s	0.0392 units per square kilometre	0.0396 units per square kilometre	0.0004 units per square kilometre	Viet Nam
2010s	0.0387 units per square kilometre	0.0395 units per square kilometre	0.0009 units per square kilometre	Viet Nam

Averages of every year both report within each decade.

Frequently asked questions

Which has higher emission totals - emissions (co2eq) (ar5) - enteric fermentation, per, Portugal or Viet Nam?: Viet Nam, at 0.0408 units per square kilometre against 0.0404 units per square kilometre in Portugal as of 2019.
What is the difference in emission totals - emissions (co2eq) (ar5) - enteric fermentation, per between Portugal and Viet Nam?: 0.0004 units per square kilometre, with Viet Nam ahead.
How many years of comparable data are there for Portugal and Viet Nam?: 59 years are reported by both, from 1961 to 2019.
How do Portugal and Viet Nam rank globally for emission totals - emissions (co2eq) (ar5) - enteric fermentation, per?: Portugal ranks 52nd and Viet Nam ranks 50th of 189 countries.
Where does this data come from?: Statizoid (derived), published as Emission Totals - Emissions (CO2eq) (AR5) - Enteric Fermentation, per square kilometre. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Portugal vs Viet Nam: Emission Totals - Emissions (CO2eq) (AR5) - Enteric Fermentation, per. Statizoid, drawing on Statizoid (derived). Retrieved 02 September 2026, from https://reference.statizoid.com/compare/emission-totals-emissions-co2eq-ar5-enteric-fermentation-per-square-kilometre/portugal/viet-nam/

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<a href="https://reference.statizoid.com/compare/emission-totals-emissions-co2eq-ar5-enteric-fermentation-per-square-kilometre/portugal/viet-nam/">Portugal vs Viet Nam: Emission Totals - Emissions (CO2eq) (AR5) - Enteric Fermentation, per</a> — Statizoid

About this data

Indicator: Emission Totals - Emissions (CO2eq) (AR5) - Enteric Fermentation, per square kilometre
Unit: units per square kilometre
Source: Statizoid (derived)
Licence: Derived by Statizoid from the sources named on the page
Coverage: 189 places, 10,097 data points, 1961–2019
Last refreshed: 02 September 2026

Emission Totals - Emissions (CO2eq) (AR5) - Enteric Fermentation 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.