How many years of comparable data are there for Hong Kong and South Asia (IDA & IBRD)?

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

Where does this data come from?

Statizoid (derived), published as Nitrous oxide (N2O) emissions (total) excluding LULUCF (Mt CO2e), per square kilometre. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Hong Kong vs South Asia (IDA & IBRD): Nitrous oxide (N2O) emissions (total) excluding LULUCF (Mt CO2e), per

Hong Kong

0.0005 Mt CO2e per square kilometre

in 2023

South Asia (IDA & IBRD)

0.0001 Mt CO2e per square kilometre

in 2023

Hong Kong rank

4th

South Asia (IDA & IBRD) rank

1st

Nitrous oxide (N2O) emissions (total) excluding LULUCF (Mt CO2e), per over time

Hong Kong
South Asia (IDA & IBRD)

How they compare

Hong Kong currently reports 0.0005 Mt CO2e per square kilometre against 0.0001 Mt CO2e per square kilometre in South Asia (IDA & IBRD), a difference of 0.0004 Mt CO2e per square kilometre.

That makes Hong Kong's figure about 5.4 times South Asia (IDA & IBRD)'s.

Across all 54 years both countries report, Hong Kong has been ahead every year.

Hong Kong ranks 4th and South Asia (IDA & IBRD) ranks 1st of 203 countries.

Hong Kong has averaged higher in every one of the 6 decades both report.

Head to head by decade

Decade	Hong Kong	South Asia (IDA & IBRD)	Difference	Ahead
1970s	0.0003 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0.0002 Mt CO2e per square kilometre	Hong Kong
1980s	0.0004 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0.0004 Mt CO2e per square kilometre	Hong Kong
1990s	0.0007 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0.0006 Mt CO2e per square kilometre	Hong Kong
2000s	0.0005 Mt CO2e per square kilometre	0.0001 Mt CO2e per square kilometre	0.0005 Mt CO2e per square kilometre	Hong Kong
2010s	0.0005 Mt CO2e per square kilometre	0.0001 Mt CO2e per square kilometre	0.0005 Mt CO2e per square kilometre	Hong Kong
2020s	0.0005 Mt CO2e per square kilometre	0.0001 Mt CO2e per square kilometre	0.0004 Mt CO2e per square kilometre	Hong Kong

Averages of every year both report within each decade.

Frequently asked questions

Which has higher nitrous oxide (n2o) emissions (total) excluding lulucf (mt co2e), per, Hong Kong or South Asia (IDA & IBRD)?: Hong Kong, at 0.0005 Mt CO2e per square kilometre against 0.0001 Mt CO2e per square kilometre in South Asia (IDA & IBRD) as of 2023.
What is the difference in nitrous oxide (n2o) emissions (total) excluding lulucf (mt co2e), per between Hong Kong and South Asia (IDA & IBRD)?: 0.0004 Mt CO2e per square kilometre, with Hong Kong ahead.
How many years of comparable data are there for Hong Kong and South Asia (IDA & IBRD)?: 54 years are reported by both, from 1970 to 2023.
How do Hong Kong and South Asia (IDA & IBRD) rank globally for nitrous oxide (n2o) emissions (total) excluding lulucf (mt co2e), per?: Hong Kong ranks 4th and South Asia (IDA & IBRD) ranks 1st of 203 countries.
Where does this data come from?: Statizoid (derived), published as Nitrous oxide (N2O) emissions (total) excluding LULUCF (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 South Asia (IDA & IBRD): Nitrous oxide (N2O) emissions (total) excluding LULUCF (Mt CO2e), per. Statizoid, drawing on Statizoid (derived). Retrieved 21 September 2026, from https://environment.statizoid.com/compare/nitrous-oxide-n2o-emissions-total-excluding-lulucf-mt-co2e-per-square-kilometre/hong-kong-sar-china/south-asia-ida-and-ibrd/

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About this data

Indicator: Nitrous oxide (N2O) emissions (total) excluding LULUCF (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: 250 places, 12,804 data points, 1970–2023
Last refreshed: 19 September 2026

Nitrous oxide (N2O) emissions (total) excluding LULUCF (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.