Air pollution: The silent killer called PM2.5
(WorldNews Environment)

Millions of people die prematurely every year from diseases and cancer caused by air pollution. The first line of defense against this carnage is ambient air quality standards. Yet, according to researchers from McGill University, over half of the world`s population lives without the protection of adequate air quality standards. Air pollution varies greatly in different parts of the world. But what about the primary weapons against it? To find answers, researchers from McGill University set out to investigate global air quality standards in a study published in the Bulletin of the World...