GOLDACH, Switzerla d, March 16, 2021 /CNW/ — New data from IQAir’s global air quality data platform, published i the 2020 World Air Quality Report a d a o li e i teractive global map, reveals the impact of COVID-19 lockdow s a d behavioural cha ges o global particulate pollutio (PM2.5) levels. “The year 2020 brought a u expected [...]