What is a healthy indoor environment?

Healthy indoor environment includes living room, office building, office, transportation, cultural entertainment and sports places, hospital wards, classrooms and activity rooms in schools and kindergartens, hotels and other places. The quality of all indoor environments is closely related to health. Let's talk about the home environment that everyone is in contact with. Home environment is an artificial small environment for family reunion, rest, study and housework. The sanitary condition of home environment directly affects the morbidity and mortality of residents. People pay more and more attention to environmental protection, but many people have not realized the impact of indoor environmental quality on health. Urban residents spend about 90% of their time working, studying and living indoors every day, and some old people and children spend more time indoors. Therefore, the indoor environment is closely related to human health and children's growth and development.