Global Policy, Sensor Tech, and Systemic Shifts in the Built Environment
The conversation around indoor air quality (IAQ) has fundamentally shifted. For decades, specialists in the built environment and public health sectors have highlighted the profound impacts of airborne pollutants on human health, often struggling to secure widespread regulatory traction.
In a recent episode of the Air Quality Matters podcast, I sat down with Lidia Morawska , Distinguished Professor at QUT (Queensland University of Technology) director of the International Laboratory for Air Quality and Health, and recipient of the 2025 Prime Minister’s Prize for Science in Australia.
Recorded at the Indoor Air 2026 Conference in Singapore, the discussion uncompressed the evolution of public receptivity toward IAQ, the mechanics of political engagement, and the transition of air quality monitoring from high-level science to practical consumer protection.
Key Discussion Topics
1. From Visible Smog to Invisible Risks
Historically, major policy shifts in air quality occurred in response to highly visible crises. The Great Smog of London in 1952 forced immediate legislative action because the pollution was dense, tangible, and undeniable.
Indoor air quality presents a distinct regulatory challenge because it is largely invisible. Everyday activities, such as burning candles or spraying aerosols, are often associated with comfort rather than risk. Lidia notes that while the recent pandemic acted as a temporary proxy for "seeing" indoor air through the fear of infection transmission, the long-term challenge remains maintaining public and regulatory momentum once the immediate crisis recedes.
2. Communicating with Policy Makers: Shifting from Panic to Pathways
A significant barrier in air quality advocacy is the language gap between scientists and politicians. While the scientific community often relies on clinical and epidemiological data, legislators respond to human stories and manageable risks.
When advocates present politicians with a massive, systemic issue, such as inadequate ventilation across an entire national school infrastructure, the default political response is often avoidance. Acknowledging a widespread crisis without an immediate financial or logistical solution creates political liability.
The solution lies in presenting structured, incremental pathways. Policy change occurs when decision-makers are provided with realistic timelines, starting with baseline monitoring and gradual improvement strategies, rather than demands for immediate, total retrofits.
3. Low-Cost Sensors as Tools for Consumer Fairness
The rapid evolution of low-cost sensing technology over the past decade is altering the dynamics of building management. Historically, regulatory monitoring required complex, expensive infrastructure. Today, compact, reliable devices can automate data cleaning and calibration using advanced data management and AI optimisation.
This technological democratisation shifts IAQ from a distant regulatory obligation to a matter of consumer protection and fairness. When occupants, parents, and tenants can easily measure carbon dioxide or particulate matter, building performance becomes transparent. It removes the burden of managing safety from the individual and places it squarely on those who operate and mandate building standards.
Highlights from the Conversation
The Inside Story of the WHO Open Letter
One of the most interesting parts of the interview covers the behind-the-scenes effort in March 2020 to compel the World Health Organisation (WHO) to recognise the airborne transmission of COVID-19. Prompted by an institutional tweet asserting the virus was not airborne, Morawska mobilised a global network of 36 scientists within three days to draft a formal challenge.
The resulting interactions highlight the deep institutional inertia within global public health bodies. Initial discussions were highly defensive, partly driven by a historical medical division between "aerosols" and "droplets" and by a structural fear of the massive economic and logistical implications of declaring an infectious agent airborne in healthcare settings.
The breakthrough ultimately required a coordinated, strategic media strategy to ensure the scientific consensus could not be ignored.
"Ethical approach dictates that even if you are not sure... it's your obligation to say it may be airborne, so it's better to take these precautions."
The P-Block Project: A Real-World Blueprint
Lidia shared details on the "P-Block" project, an initiative designed to transform an existing building into the first in the world to meet advanced indoor air quality standards derived from peer-reviewed risk assessment models.
The Radon Disconnect
The discussion also addressed a frustrating anomaly in environmental health: radon gas. Unlike complex indoor chemistries, radon is a scientifically resolved issue with clear geographical mapping, well-understood ingress routes, and affordable engineering fixes. Yet, international policy remains highly inconsistent, exposing populations to severe, preventable long-term health risks. Lidia attributes this to a gap in implementation; once the scientific community deemed the problem "solved," advocacy waned, leaving a critical void between research and building enforcement.
One Take: Moving Beyond Tenant Blame in Social Housing
In One Take, I review a pivotal study published in the Journal of Housing Studies by researchers at Dublin City University. Titled Transforming Social Housing: Moving Beyond Tenant Blame to Address Systemic Indoor Environmental Quality Challenges for Healthy Homes in Ireland, the paper tackles the persistent issue of dampness, condensation, and mould within the social housing sector.
The study, based on interviews with 28 stakeholders including tenants, policy makers, and technical experts, challenges the long-standing narrative that indoor mould is primarily caused by tenant lifestyle choices—such as drying clothes indoors or failing to open windows.
The researchers identified three systemic themes behind the crisis:
Infrastructure Failures: Many moisture issues are structurally baked into the properties. For instance, sealing open fireplaces to meet modern European energy directives without installing compensatory ventilation traps moisture. Additionally, rapid construction during the "Celtic Tiger" economic boom left a legacy of thermal bridging and weak spots in building envelopes where condensation is inevitable.
Reactive Maintenance: Housing bodies frequently operate on a responsive, ad-hoc repair model rather than proactive, preventative maintenance. This approach allows minor structural issues to deteriorate into severe environmental hazards before action is taken, while complex apartment blocks are routinely bypassed in standard upgrade programs.
The Reality of Fuel Poverty: The study frames "poor lifestyle choices" as rational adaptations to fuel poverty and structural deficiencies. Tenants in cold, damp climates who cannot afford rising heating costs naturally struggle to manage indoor moisture.
The paper calls for a fundamental paradigm shift: moving away from blame-centric tenant communication toward mandatory, fully funded proactive maintenance, objective data gathering, and treating residents as active partners in maintaining healthy homes.
The Air Quality Matters Podcast in Partnership with
Particles Plus - Eurovent- Aico - Lindab - S&P
The One Take Podcast in Partnership with
SafeTraces - Inbiot - Farmowood - Ei Electronics - iAir Group - Zehnder
Do check them out in the links and on the Air Quality Matters Website.
If you haven't checked out the YouTube channel its here. Do subscribe if you can; lots more content is coming soon.