Vitamin C may have the potential to protect people against lung disease caused by traffic-related air pollution, bushfires and dust storms, new research finds. Researchers examined the effect of vitamin C in reducing lung inflammation and mitochondrial loss caused by PM2.5—tiny airborne particles commonly found in urban pollution—finding it could be protective. Air pollution is becoming the second-highest preventable risk factor to our health, at a level greater than smoking. In 2019, air pollution contributed to more than 200 million healthy life years lost to premature death or disability. There is no safe level of air pollution caused by PM2.5,...