Air pollution linked to heightened suicide risk in major meta-study https://www.theguardian.com/environment/2026/sep/15/air-pollution-linked-to-higher-suicide-risk-research-suggests Study links short-term and long-term exposure to PM2.5 to significantly higher odds of death by suicide, attempted suicide and suicidal thoughts https://jech.bmj.com/content/early/2026/09/08/jech-2025-225491