We are what we breathe: environmental factors in biological ageing
Volcanic eruptions, floods, and heatwaves have forced us to think seriously about whether the air we breathe will allow us to age healthily. To try to answer this question, we selected a unique sample of five middle-income countries on four continents and used NASA satellite remote sensing data to assess the associations between long-term exposure to ambient PM2.5 and frailty in older populations.