The Air Quality Index (AQI) is used by various government agencies to quantify and communicate air quality to the public. It indicates the degree of air purity or pollution and the human health effects associated with this. Different countries have their own indices which correspond to different established air quality standards. Continue reading
Air pollution is caused by the emission to the atmosphere of certain substances which, alone or through chemical reaction, can damage human health and the environment.
The single pollutants causing most damage to ecosystems, human health and materials are nitrogen oxides (NOx), sulphur dioxide (SO2), ammonia (NH3), ground level ozone and airborne fine dust, known as particulate matter (PM). Continue reading