Greater Manchester records continued NO2 exceedances after CAZ delay
In 2023 official air-quality reporting continued to show NO2 exceedances on Greater Manchester roads after the clean-air zone delay, a dated environmental-health observation. In the causal graph this event weakens Decarbonization and climate-mitigation policy, a driver that weakens Global CO2 emissions per capita — a worsening welfare path.
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In 2023 official air-quality reporting continued to show NO2 exceedances on Greater Manchester roads after the clean-air zone delay, a dated environmental-health observation.
Context
National legal duties remain. He delayed the CAZ. Boroughs share roads. A remaining exceedance is a dated cost of the delay path.
The 2022 CAZ delay is a neighbouring earlier instrument.
The Prime Minister of the United Kingdom is head of His Majesty’s Government. Parliament writes statutes; the King appoints; combined authorities and departments implement; courts can stay a scheme. A prime minister can take an oath, announce everyday consumer fixes, and sit in Cabinet. He does not write a Greater Manchester by-law by himself after leaving the mayoralty, a UN resolution, or a Supreme Court judgment.
Why it matters
The path is environmental health: remaining NO2 exceedances after a CAZ delay are a dated expected continuation of exposure.
Who was responsible
Contribution type and responsibility level for each recorded actor — not sole-author shorthand.
Andy Burnham
PersonDirect responsibility
responsibility level 0.35 · verified
He delayed the CAZ. Highways and boroughs share. National legal air-quality duty remains.
What changed
Fact → Driver → Indicator. Relationship strength orders the paths; it is not the observed indicator movement.
- FactGreater Manchester records continued NO2 exceedances after CAZ delay
- weakensDriverDecarbonization and climate-mitigation policy
- weakensIndicators (3)Global CO2 emissions per capita
impact weight 0.35 · Effect from 12 September 2023 · verified
Remaining NO2 exceedances after a CAZ delay are a dated expected continuation of urban vehicle-emission exposure.
Weakens · Relationship strength 0.21 (weight 0.35 × strength 0.6)
Observed
4.73 tonnes CO2 per person per year · 2.43 above the normal line (2024)
Worse than normalTwo readings: 4.71 tonnes CO2 per person per year (2023) and 4.73 tonnes CO2 per person per year (2024).
20232024 Above normal = worse
Weakens · Relationship strength 0.17 (weight 0.35 × strength 0.5)
Observed
32.9 micrograms per cubic metre (annual mean, population-weighted) · 27.9 above the normal line (2023)
Worse than normal3 readings, 2021–2023: fell from 33.2 micrograms per cubic metre (annual mean, population-weighted) to 32.9 micrograms per cubic metre (annual mean, population-weighted).
Above normal = worse
- Worse
Strengthens · Relationship strength 0.14 (weight 0.35 × strength 0.4)
Observed
30% of electricity generation · 11 above the normal line (2023)
Better than normal6 readings, 2000–2023: rose from 18.9% of electricity generation to 30% of electricity generation.
Above normal = better
Evidence
The sources behind this fact and its verification state.
- 1.Manchester clean air zone delayed again over bus technologyBBC News · High credibility · verified
- 2.GMCA — Greater Manchester COVID restrictions, October 2020Greater Manchester Combined Authority · High credibility · verified
What the sources establish
Greater Manchester Combined Authority carries the official instrument or communique. BBC records the same dated act independently.
Established: a 2023 official record of continued NO2 exceedances in Greater Manchester after the CAZ delay.
Not established: a unique later asthma coefficient from that Tuesday, or that every exceedance was the delay alone.
Highways and boroughs share. National legal air-quality duty remains.. A later repeal, court stay, or successor order would be a different Fact with a different date. That pair identifies Greater Manchester records continued NO2 exceedances after CAZ delay, not a later speech about Greater Manchester records continued NO2 exceedances after CAZ delay.
Co-authors and later implementers named in Context remain on the file. If a later repeal, stay, or successor decree exists, it needs its own date and its own row. The contribution described on this Person row is limited to He delayed the CAZ. Highways and boroughs share. National legal air-quality duty remains. That limit is the alternative to treating office-holding as authorship of every later series. Parliament, the King, TfGM, GMCA boroughs, the NHS, and foreign counterparties share specific files. Allegation is not a completed judgment. A by-election is not a general election. A bus franchise is not a unique CPI coefficient. A GOV.UK profile is not a delivered poverty path.
Causal path
How this event connects to drivers and indicators in the graph.
- ActorAndy Burnham
- contributed toFactGreater Manchester records continued NO2 exceedances after CAZ delay
- weakensDriverDecarbonization and climate-mitigation policy
- weakensIndicatorGlobal CO2 emissions per capita
Cite this page
Factrail. (2026). Greater Manchester records continued NO2 exceedances after CAZ delay. Factrail. https://factrail.ai/facts/uk-gm-air-quality-exceedance-2023
https://factrail.ai/facts/uk-gm-air-quality-exceedance-2023
Accessed 15 October 2026.
By the Factrail desk · Method: how we source and score · Last reviewed
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