Air pollution linked to sharp rise in construction site accidents

Air pollution linked to sharp rise in construction site accidents

A new study has uncovered a striking link between air pollution and workplace safety, revealing that even moderate increases in nitrogen dioxide (NO₂) can dramatically raise the risk of accidents on construction sites.

While previous research has focused on the health impacts of air pollution, Heads Up: Does Air Pollution Cause Workplace Accidents? by Victor Lavy, Genia Rachkovski and Omry Yoresh published in the Journal of Public Economics, is one of the first to show a direct, causal effect on workplace accidents, specifically implicating NO₂ over others.

Analysing millions of daily records from construction sites across Israel with detailed pollution data, the researchers found a 10-parts-per-billion (ppb) rise in NO₂ increases the likelihood of a construction accident by 25%.

NO₂ is a pungent gas from traffic and industry which can impair breathing and reduce alertness within hours of exposure, making workers more prone to mistakes and injuries.

The research suggests that the danger escalates rapidly at higher pollution levels. On days classified as “moderately polluted” by US and European standards, the risk of an accident more than doubles. On “unhealthy” days, it nearly quadruples.

Victor Lavy, Professor of Economics at University of Warwick and a CAGE Research Associate said:

“Construction work is already hazardous, but our results show that poor air quality can make it much more dangerous, particularly when workers are tired or under cognitive strain.

“The implications are not just human, but economic. We estimate that high-pollution days account for about 14% of all severe construction accidents in Israel which translates into tens of millions of dollars in extra insurance payouts each year.”

Although the study focused on construction, the authors warn that the findings could extend to other high-stakes professions such as emergency responders, healthcare workers, and anyone whose job demands alertness and quick decision-making.

“Our results suggest that air pollution is not just a public health issue, but a workplace safety issue,” continued Professor Lavy. “Policymakers and employers should take note, especially as climate change and urbanisation make air quality an ever more pressing concern.”

The researchers also ran a cost-benefit analysis on potential policy responses. They found that, while shutting down construction sites on polluted days would only be cost-effective at extremely high pollution levels, other interventions such as targeted warnings, improved safety training, or personal protective equipment could be more practical and impactful.

• Read the research: Heads Up: Does Air Pollution Cause Workplace Accidents?