This study examines the relation between chemical characteristics of fog water and atmospheric pollutants in Taiwan, suggesting that fog water may be heavily impacted in some areas of East Asia, where emissions are high due to the intense combustion of fossil fuels, high density of industrial emission sources, and low emission control standards
To study the contamination of fog water by pollutants as emitted in East Asia, Taiwan is a suited investigation area. The subtropical island of Taiwan features very humid air and a high Central Mountain Range almost over its entire north-south extension. - Many of its mid- and highland cloud forests experience more than 100 days of fog per year, while there are more than 250 days of fog per year reported for mountains higher than 2000m above mean sea level (including Mt. Ali, Mt. Lulin, and Mt. Yu).
source: Chemical Composition of Fog Water at Four Sites in Taiwan