Air pollution, environmental noise, and exposure to toxic chemicals are all linked to a higher risk of mental health issues, the European Environment Agency warns.
Exposure to pollution - especially air, noise, and toxic chemicals - is emerging as a significant contributor to mental health conditions, the European Environment Agency warns.
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The agency calls for “urgent and drastic action” on pollution, warning that even modest reductions could yield significant improvements in mental health outcomes.
Mental health is shaped by an interplay of intrinsic factors, including genetics, social and economic determinants, and psychological and lifestyle factors.
Pollution has been identified as a possible trigger for mental health conditions by aggravating symptoms or contributing to the onset of conditions through long-term exposure.
Air pollution
Exposure to polluted air in utero, during childhood, and early adolescence has been linked to structural and functional brain changes.
The EEA noted that all systematic or narrative reviews investigating the effects of air pollution on depression show a significant association between long-term exposure to poor air quality.
The evidence is especially strong for fine particulate matter (PM2.5) and nitrogen dioxide (NO2).
Recent research has also established a link between periods of high pollution and increased rates of depression. Short-term peaks in poor air quality exposure have additionally been associated with a worsening of schizophrenia symptoms.
Environmental noise
Most research on the topic has focused on transportation noise, including road traffic, railways, and aircraft.
Chronic exposure to this noise can activate the body’s stress response, increasing underlying inflammation and oxidative stress, which in turn can worsen mental health.
Road traffic is the most studied source of transportation noise in relation to mental health. Research suggests that for every 10dB rise in noise levels, there is a small but measurable increase in the risk of depression and anxiety.
Aircraft noise carries the strongest per-decibel association with mental health disorders, particularly depression, the agency noted. One study found a 12 percent increase in depression risk per 10dB rise in aircraft noise levels.
The EEA also noted that aircraft noise causes greater annoyance than other forms of transport noise at comparable levels, and that annoyance can serve as a pathway to depression and anxiety.
“People reporting extreme annoyance have nearly double the prevalence of these conditions, with aircraft noise being the top source and social vulnerability amplifying these effects,” the EEA’s publication noted, adding that sensitivity to noise has a stronger association with mental health symptoms than the noise levels themselves.
Previous EEA research also highlighted how exposure to environmental noise, particularly in the home, is associated with higher rates of behavioural issues in children.
Chemical exposure
Exposure to even small amounts of certain chemicals can have harmful consequences for health, including on mental health.
The EEA analysed scientific research linking exposure to chemicals such as lead and endocrine disruptors to mental health outcomes, focusing on metals, second-hand smoke, endocrine-disrupting chemicals, and pesticides.
The evidence is most consistent for heavy metals, particularly lead, and for second-hand smoke. Both have been linked to depression and schizophrenia, especially following prenatal and childhood exposure.
Research also consistently associates pesticide exposure with depression, schizophrenia, and anxiety.
Endocrine-disrupting chemicals interfere with the body’s hormones and endocrine system. The most common include bisphenol A and per- and polyfluoroalkyl substances (PFAS). Prenatal exposure to bisphenol A has been associated with childhood depression and anxiety.
Burden of mental health in Europe
One in six people in Europe lives with a mental health condition, and one in three of those affected does not receive adequate treatment, according to the World Health Organization (WHO).
In the European Union, more than 11 million disability-adjusted life years were lost in 2023 due to mental health disorders. These numbers are projected to increase in the coming years, particularly among young people and vulnerable groups.
