VOCs are chemicals that easily evaporate into the air and can originate from various sources both indoors like household and beauty products, building materials, and cigarette smoke, as well as outdoors like vehicle emissions, industrial processes, construction activities, agriculture from pesticides, gasoline vapors, and from VOC containing paints, coatings, and sealants. Their impact on human health may include respiratory irritation, headaches, and dizziness, with some VOCs being carcinogenic and harmful to the nervous system. Certain VOCs have been linked to reproductive and developmental issues.