London’s Low-Emission Initiatives Cut Emergency Hospital Admissions

Emergency admissions in central London rose 3 % annually before 2017, then fell 3 % per year after the T-charge (2017) and Ulez (2019). Heart-related emergencies dropped 8 %; breathing-related emergencies fell 6 %.

The Guardian

The T-charge, added to London’s congestion fee in 2017, targeted older vehicles, prompting upgrades. The 2019 Ulez barred polluting cars from the central zone, aiming to cut traffic-related pollutants, especially nitrogen dioxide.

The Guardian

Pre-scheme admissions rose 3 % annually; post-scheme they fell 3 %. Heart emergencies declined 8 %, breathing emergencies 6 % (not statistically significant). NO2 levels fell about 44 % before lockdowns.

The Guardian

Dr Rosemary Chamberlain (Imperial College London) noted the study controlled for temporal trends, linking health gains to emission reductions. Dr Daniela Fecht emphasized that, while walking, cycling and noise changes may help, the primary driver is lower air pollution.

The Guardian

Respiratory benefits were not statistically significant, possibly because analysis covered only adults; children were excluded. The Ulez launch coincided with COVID-19, preventing isolation of zone effects from pandemic-related changes.

The Guardian

The admission declines indicate low-emission zones can improve population health, lessen emergency-service demand and lower healthcare costs. The researchers conclude that clean-air zones can deliver measurable public-health benefits and provide empirical support for policymakers considering similar interventions in other urban areas.

The Guardian

Researchers recommend studying childhood respiratory outcomes and maintaining continuous air-quality and health surveillance to assess long-term benefits of emission controls. Ongoing monitoring of air-quality metrics alongside health data will be essential to evaluate the durability of the benefits as traffic patterns evolve post-pandemic.

The Guardian

• “Given what we know about the link between air pollution and health, we wanted to understand if the introduction of the T-charge and Ulez also resulted in a reduction in people being admitted to hospital.” — Dr Rosemary Chamberlain, Imperial College London

The Guardian

• “Dr Daniela Fecht, who led the study, said: “We controlled for other factors and trends in our study design so we can conclude that reductions in hospital admissions are directly linked to the emission reduction initiatives in central London.” — Dr Daniela Fecht, Imperial College London

The Guardian

• “Other factors such as more walking and cycling or a reduction in traffic noise may also be contributing but we are fairly certain that these improvements in health are due to the reductions in air pollution. Our results provide clear evidence that clean air zones and low emission zones can bring public health benefits.” — Dr Daniela Fecht, Imperial College London

The Guardian

• “The inconclusive finding for respiratory outcomes may be partly because our analysis considered adults only. Children are particularly susceptible to the effects of air pollution on respiratory health, so an analysis of childhood respiratory outcomes may show a more conclusive result.” — Dr Rosemary Chamberlain, Imperial College London

The Guardian