A hazy view at Kuala Lumpur while the API (Air Pollutant Index) reading is under unheathy level and nearly very unheathy level. The open air burning of crop remnants at Sumantera Indonesia is the source of haze. Haze always lead to cough, sore throat, sniveling and even Asthma outburst and death. In above photo we can see some poeple are wearing mask to against the haze. Thousand of schools are shut down and some of the districts are declared under emergency while the situation is worst.
Recently the API reading at my homecity is among moderate to unhealthy level. Since two days ago the haze seem coming back and we are worry.
* Link to : Air Pollutant Index Malaysia- up to date
Related news : Malaysia smog level hits 16-year high 24/06/2013
Haze is traditionally an atmospheric phenomenon where dust, smoke and other dry particles obscure the clarity of the sky. The World Meteorological Organization manual of codes includes a classification of horizontal obscuration into categories of fog, ice fog, steam fog, mist, haze, smoke, volcanic ash, dust, sand and snow. Sources for haze particles include farming (ploughing in dry weather), traffic, industry, and wildfires.
Seen from afar (e.g. approaching airplane) and depending upon the direction of view with respect to the sun, haze may appear brownish or bluish, while mist tends to be bluish-grey. Whereas haze often is thought of as a phenomenon of dry air, mist formation is a phenomenon of humid air. However, haze particles may act as condensation nuclei for the subsequent formation of mist droplets; such forms of haze are known as "wet haze."
Haze often occurs when dust and smoke particles accumulate in relatively dry air. When weather conditions block the dispersal of smoke and other pollutants they concentrate and form a usually low-hanging shroud that impairs visibility and may become a respiratory health threat. Industrial pollution can result in dense haze, which is known as smog.
Since 1991, haze has been a particularly acute problem in Southeast Asia, Indonesian forest fires burnt to clear land being the reason. In response to the 1997 Southeast Asian haze, the ASEAN countries agreed on a Regional Haze Action Plan (1997). In 2002, all ASEAN countries except Indonesia signed the Agreement on Transboundary Haze Pollution, but the pollution is still a problem today. Under the agreement the ASEAN secretariat hosts a co-ordination and support unit.