How many years of comparable data are there for Hong Kong and Hungary?

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

Where does this data come from?

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

Hong Kong vs Hungary: Methane (CH4) emissions from Building (Energy) (Mt CO2e), per square

Hong Kong

0 Mt CO2e per square kilometre

in 2023

Hungary

0 Mt CO2e per square kilometre

in 2023

Hong Kong rank

52nd

Hungary rank

51st

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

Hong Kong
Hungary

How they compare

Hungary currently reports 0 Mt CO2e per square kilometre against 0 Mt CO2e per square kilometre in Hong Kong, a difference of 0 Mt CO2e per square kilometre.

The two have swapped places 7 times across 54 shared years of data; in 1970 it was Hong Kong ahead.

Hong Kong ranks 52nd and Hungary ranks 51st of 197 countries.

Across the 6 decades both report, Hong Kong averaged higher in 3 and Hungary in 3.

Head to head by decade

Decade	Hong Kong	Hungary	Difference	Ahead
1970s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	Hong Kong
1980s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	Hungary
1990s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	Hong Kong
2000s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	Hong Kong
2010s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	Hungary
2020s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	Hungary

Averages of every year both report within each decade.

Frequently asked questions

Which has higher methane (ch4) emissions from building (energy) (mt co2e), per square, Hong Kong or Hungary?: Hungary, at 0 Mt CO2e per square kilometre against 0 Mt CO2e per square kilometre in Hong Kong as of 2023.
What is the difference in methane (ch4) emissions from building (energy) (mt co2e), per square between Hong Kong and Hungary?: 0 Mt CO2e per square kilometre, with Hungary ahead.
How many years of comparable data are there for Hong Kong and Hungary?: 54 years are reported by both, from 1970 to 2023.
How do Hong Kong and Hungary rank globally for methane (ch4) emissions from building (energy) (mt co2e), per square?: Hong Kong ranks 52nd and Hungary ranks 51st of 197 countries.
Where does this data come from?: Statizoid (derived), published as Methane (CH4) emissions from Building (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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Hong Kong vs Hungary: Methane (CH4) emissions from Building (Energy) (Mt CO2e), per square. Statizoid, drawing on Statizoid (derived). Retrieved 22 September 2026, from https://environment.statizoid.com/compare/methane-ch4-emissions-from-building-energy-mt-co2e-per-square-kilometre/hong-kong-sar-china/hungary/

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<a href="https://environment.statizoid.com/compare/methane-ch4-emissions-from-building-energy-mt-co2e-per-square-kilometre/hong-kong-sar-china/hungary/">Hong Kong vs Hungary: Methane (CH4) emissions from Building (Energy) (Mt CO2e), per square</a> — Statizoid

About this data

Indicator: Methane (CH4) emissions from Building (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: 244 places, 12,543 data points, 1970–2023
Last refreshed: 22 September 2026

Methane (CH4) emissions from Building (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.