Answer extracted from The Responsible Finance Podcast — listen to the full episode below.
How does Enjoy the Air model air quality interventions and their health outcomes?
Enjoy the Air consolidates data from transport, population, health, healthcare costs, weather and air quality to prove cause and effect between air pollution and outcomes. The company then models both hard interventions like low emission zones and soft interventions like green spaces, using evidence from published research and overlaying it with bespoke local data to quantify healthcare savings and population health improvements.
This data-driven approach transforms abstract air quality concerns into concrete, measurable evidence that local authorities can act upon. As Kate Barnard explains in the episode, the integration of these multiple data streams is what enables Enjoy the Air to move beyond speculation and provide evidence-backed interventions.
Building a multi-source evidence foundation
At its core, Enjoy the Air's methodology rests on assembling diverse data sources that individually tell part of the story but collectively demonstrate the full impact of air pollution. The company pulls together information on transport patterns, population demographics, existing health outcomes, the actual costs that healthcare systems bear from air-related illnesses, meteorological patterns and baseline air quality measurements.
This consolidation step is crucial because air quality doesn't exist in isolation—it intersects with mobility, economics, health infrastructure and human behaviour. By bringing these dimensions into a single analytical framework, Enjoy the Air can isolate the specific contribution air pollution makes to health costs and outcomes, rather than presenting air quality as merely one environmental concern among many.
From research to local reality
Enjoy the Air doesn't invent its intervention models from scratch. Instead, the company draws on published research—such as studies conducted in London and other cities—that already demonstrate how specific actions affect air quality and health. However, generic research alone isn't sufficient, because air quality challenges vary significantly by location, population density, transport infrastructure and economic conditions.
The key innovation is that Enjoy the Air overlays bespoke local data onto these proven intervention models, tailoring the evidence to each specific region. This allows the company to answer the critical questions that local authorities need: How much will healthcare costs actually drop if we implement a low emission zone here? How many additional years of healthy life might residents gain? How does this compare to the cost of the intervention itself?
"The local authorities in the UK have a legal legislative requirement to document and provide evidence of their air quality and it is quite surprising how many do not meet it."
Kate Barnard — Founder and Chief Executive of Enjoy the Air. After 22 years in a corporate career at Rolls-Royce, Barnard founded Enjoy the Air, an evidence-based air quality intelligence company, two and a half years ago. She describes herself as a data detective and has built a venture that transforms fragmented air quality data into actionable policy evidence.
This accountability gap that Barnard highlights is precisely where data integration becomes essential. Many local authorities lack the infrastructure or expertise to consolidate air quality, health and economic data themselves, making Enjoy the Air's integrated platform a practical solution to meet regulatory obligations while also building the business case for intervention.
For deeper insight into how this approach plays out in specific regions, the full episode covers how different UK local authorities are implementing these evidence-based strategies and the measurable differences in outcomes between regions that prioritise air quality improvement and those that do not.
See also
How do Scottish local authorities under COSLA perform against air quality targets compared to other UK regions?
Every one of the COSLA regions, the community of local authorities in Scotland, meet the harsher air quality targets that they set themselves, demonstrating strong regional performance on air quality governance.
What is the HALO certification and how does it address air quality compliance in the UK?
The HALO certification, funded by the British Business Bank and Swig Finance through start-up loans, is an audit developed by Control Union UK that ensures air quality compliance standards are met systematically.
Which UK cities are identified as most at risk of losing residents due to air quality concerns?
London, Manchester, Birmingham and Liverpool are the bigger cities most at risk of losing their residents due to air quality issues, based on Yonder polling of UK residents commissioned by Enjoy the Air.
Key takeaways
- Enjoy the Air integrates six data categories—transport, population, health, healthcare costs, weather and air quality—to establish causal links between air pollution and health outcomes.
- Both hard interventions like low emission zones and soft interventions like green spaces are modelled using published research tailored with local data.
- The bespoke overlay approach enables specific quantification of healthcare savings and population health gains for each region.
- Many UK local authorities lack the data infrastructure to meet their legal air quality documentation requirements, creating a clear business case for integrated data platforms.