Atmospheric Submicron Particulate Matter (PM): An Emerging Global Environmental Concern

Abstract

Particulate matter (PM) is important for its human health concern, its role in atmospheric physico-chemistry and that for aesthetics. Past few decades have seen raised understanding, awareness and concern on the impacts of PM on human health, air quality and climate globally. However, knowledge gaps related to its nature, formation, transport and impact continue to exist; particularly for those related to smaller PM (mainly 'submicron PM', also referred to as 'PM 1 ') and their contributions to various processes and impacts.