At present, people spend more than 80%
of time in buildings
office, meeting room, department stores, etc. Air pollution is always originated from environment,
moreover, we usually find it in buildings that we live in everyday life. World Health Organization (WHO)
estimated that 30% of buildings are not in hygienic condition. Every time and anyplace you go around,
pollution always attaches to your body and clothes causing contamination of the surrounding area.
As a consequence, the quality of air in buildings is very vital to human ways of life that will affect to
mind & body health in every aspect.