When high in the atmosphere, ozone protects Earth from harmful solar radiation—but ozone at ground level is a significant pollutant. Exposure to high concentrations of ground-level ozone aggravates respiratory illnesses, thus exacerbating the negative health effects of heat and contributing to the catastrophic impacts of recent heatwaves and drought in Europe.
Click here for original story, Scientists solve air quality puzzle: Why does ozone linger long after its ban?
Source: Phys.org