Air quality is often overlooked, yet it has a profound and lasting impact on our health and wellbeing. Surprisingly, poor air quality is the single largest environmental health risk we face globally - but because it’s invisible, many people don’t give it a second thought.
We breathe instinctively, unaware of what we’re drawing into our lungs. That’s a problem when you consider that the average person spends around 90% of their life indoors - roughly 70 years out of an 80 year lifespan - with over 55 years spent in their own home.
Unlike food or water, we can’t opt out of breathing. You might skip a meal or choose filtered water, but there’s no escaping the air around you. This makes indoor air quality one of the most important environmental factors affecting our long - term health.
Airborne pollutants don’t just affect the lungs - they travel through the bloodstream and impact every organ and cell in the body. From respiratory diseases like asthma to cardiovascular conditions, cognitive decline, Alzheimer’s, cancer, and other chronic illnesses, poor air quality plays a major role.
The economic cost is just as alarming. In the UK alone, air pollution costs an estimated £20 billion annually, accounting for healthcare, lost productivity, absenteeism, and related expenses.
Despite this staggering figure, we've normalised exposure to pollutants through what's known as "tolerable risk" - accepting a level of danger simply because it's so widespread. Even where building regulations exist, most ventilation standards prioritise comfort - not health.
Indoor air is a complex chemical soup. Many of the everyday products we use - like cleaning sprays, air fresheners, scented candles, and incense - release harmful substances. Ingredients such as limonene (used in citrus scents) and pinene (found in pine scents) can react with indoor ozone to form formaldehyde and particulate matter - both of which are known to harm human health.
Even common building materials - such as carpets, paints, plasterboard, and timber products - can off - gas volatile organic compounds (VOCs) into the air, creating a mix of pollutants that are difficult to predict or control.
Whether new or recently renovated, around three - quarters of buildings fail to meet even the minimum ventilation standards. This is often due to cost - cutting during construction, where systems are built to minimum legal requirements with no room for wear and tear or changes in usage over time.
Unlike other engineered systems that include buffers or redundancies, ventilation systems are often under - specified, leaving occupants exposed to poor indoor air quality on a daily basis.
The good news? Air quality monitoring technology is improving rapidly, giving homeowners, schools, and businesses the ability to track real - time indoor pollution levels. This transparency is a powerful first step.
In the future, buildings will be assessed based on actual performance, not just compliance at the time of construction. This will push building owners, architects, and developers to take ventilation and indoor air quality seriously.
As individuals, our first line of defence is awareness. If you or your family experience recurring health issues - like fatigue, headaches, allergies, or respiratory problems - indoor air pollution could be a contributing factor.
Air quality may be invisible, but its impact is very real. From chronic illness to cognitive decline, the air we breathe is shaping our health every day. Don’t wait for symptoms to appear - prioritise clean air and demand better from the spaces where you live, work, and learn.
Watch the full podcast epsiode here
