Air Pollution Is The Biggest Threat To Human Health: WHO
WHO released its first air quality guidelines since 2005 on September 22, with the goal of lowering mortality from key pollutants that cause human deaths. In the guidance to its 194 members, it has reduced the recommended maximum limits for several pollutants. WHO says, "Almost 80% of deaths related to PM2.5 could be avoided in the world if the current air pollution levels were reduced to... updated guideline."