Source: China – South China Morning PostThe UN health agency says nearly everybody in the world breathes air that does not meet its standards for air quality, calling for more action to reduce fossil-fuel use, which generates pollutants that cause respiratory and blood-flow problems and leads to millions of preventable deaths each year. The World Health Organization, about six months after tightening its guidelines on air quality, on Monday issued an update to its database on air quality that draws on information from a growing…Read More