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

55 years are reported by both, from 1970 to 2024.

Where does this data come from?

Statizoid (derived), published as Methane (CH4) emissions (total) excluding LULUCF (Mt CO2e), per capita. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Hong Kong vs Sierra Leone: Methane (CH4) emissions (total) excluding LULUCF (Mt CO2e), per capita

Hong Kong

0 Mt CO2e per person

in 2024

Sierra Leone

0 Mt CO2e per person

in 2024

Hong Kong rank

147th

Sierra Leone rank

148th

Methane (CH4) emissions (total) excluding LULUCF (Mt CO2e), per capita over time

Hong Kong
Sierra Leone

How they compare

Hong Kong currently reports 0 Mt CO2e per person against 0 Mt CO2e per person in Sierra Leone, a difference of 0 Mt CO2e per person.

The two have swapped places 11 times across 55 shared years of data; in 1970 it was Sierra Leone ahead.

Hong Kong ranks 147th and Sierra Leone ranks 148th of 203 countries.

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

Head to head by decade

Decade	Hong Kong	Sierra Leone	Difference	Ahead
1970s	0 Mt CO2e per person	0 Mt CO2e per person	0 Mt CO2e per person	Sierra Leone
1980s	0 Mt CO2e per person	0 Mt CO2e per person	0 Mt CO2e per person	Hong Kong
1990s	0 Mt CO2e per person	0 Mt CO2e per person	0 Mt CO2e per person	Sierra Leone
2000s	0 Mt CO2e per person	0 Mt CO2e per person	0 Mt CO2e per person	Hong Kong
2010s	0 Mt CO2e per person	0 Mt CO2e per person	0 Mt CO2e per person	Sierra Leone
2020s	0 Mt CO2e per person	0 Mt CO2e per person	0 Mt CO2e per person	Hong Kong

Averages of every year both report within each decade.

Frequently asked questions

Which has higher methane (ch4) emissions (total) excluding lulucf (mt co2e), per capita, Hong Kong or Sierra Leone?: Hong Kong, at 0 Mt CO2e per person against 0 Mt CO2e per person in Sierra Leone as of 2024.
What is the difference in methane (ch4) emissions (total) excluding lulucf (mt co2e), per capita between Hong Kong and Sierra Leone?: 0 Mt CO2e per person, with Hong Kong ahead.
How many years of comparable data are there for Hong Kong and Sierra Leone?: 55 years are reported by both, from 1970 to 2024.
How do Hong Kong and Sierra Leone rank globally for methane (ch4) emissions (total) excluding lulucf (mt co2e), per capita?: Hong Kong ranks 147th and Sierra Leone ranks 148th of 203 countries.
Where does this data come from?: Statizoid (derived), published as Methane (CH4) emissions (total) excluding LULUCF (Mt CO2e), per capita. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Hong Kong vs Sierra Leone: Methane (CH4) emissions (total) excluding LULUCF (Mt CO2e), per capita. Statizoid, drawing on Statizoid (derived). Retrieved 21 September 2026, from https://environment.statizoid.com/compare/methane-ch4-emissions-total-excluding-lulucf-mt-co2e-per-capita/hong-kong-sar-china/sierra-leone/

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<a href="https://environment.statizoid.com/compare/methane-ch4-emissions-total-excluding-lulucf-mt-co2e-per-capita/hong-kong-sar-china/sierra-leone/">Hong Kong vs Sierra Leone: Methane (CH4) emissions (total) excluding LULUCF (Mt CO2e), per capita</a> — Statizoid

About this data

Indicator: Methane (CH4) emissions (total) excluding LULUCF (Mt CO2e), per capita
Unit: Mt CO2e per person
Source: Statizoid (derived)
Licence: Derived by Statizoid from the sources named on the page
Coverage: 250 places, 13,750 data points, 1970–2024
Last refreshed: 21 September 2026

Methane (CH4) emissions (total) excluding LULUCF (Mt CO2e) divided by Population, total, matched on country and year. Neither publisher issues this ratio as a series; it is computed here from both.