How many years of comparable data are there for Bulgaria and United States?

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.

Bulgaria vs United States: Methane (CH4) emissions from Transport (Energy) (Mt CO2e), per square

Bulgaria

0 Mt CO2e per square kilometre

in 2023

United States

0 Mt CO2e per square kilometre

in 2023

Bulgaria rank

65th

United States rank

67th

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

Bulgaria
United States

How they compare

Bulgaria currently reports 0 Mt CO2e per square kilometre against 0 Mt CO2e per square kilometre in United States, a difference of 0 Mt CO2e per square kilometre.

That makes Bulgaria's figure about 1.1 times United States's.

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

Bulgaria ranks 65th and United States ranks 67th of 194 countries.

Across the 6 decades both report, Bulgaria averaged higher in 1 and United States in 5.

Head to head by decade

Decade	Bulgaria	United States	Difference	Ahead
1970s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	United States
1980s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	United States
1990s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	United States
2000s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	United States
2010s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	United States
2020s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	Bulgaria

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, Bulgaria or United States?: Bulgaria, at 0 Mt CO2e per square kilometre against 0 Mt CO2e per square kilometre in United States as of 2023.
What is the difference in methane (ch4) emissions from transport (energy) (mt co2e), per square between Bulgaria and United States?: 0 Mt CO2e per square kilometre, with Bulgaria ahead.
How many years of comparable data are there for Bulgaria and United States?: 54 years are reported by both, from 1970 to 2023.
How do Bulgaria and United States rank globally for methane (ch4) emissions from transport (energy) (mt co2e), per square?: Bulgaria ranks 65th and United States ranks 67th 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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Bulgaria vs United States: 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/bulgaria/united-states/

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<a href="https://environment.statizoid.com/compare/methane-ch4-emissions-from-transport-energy-mt-co2e-per-square-kilometre/bulgaria/united-states/">Bulgaria vs United States: 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.