Many environmental factors have been associated with asthma's development and exacerbation including allergens, air pollution, and other environmental chemicals. Smoking during pregnancy and after delivery is associated with a greater risk of asthma-like symptoms. Low air quality from factors such as traffic pollution or high ozone levels, has been associated with both asthma development and increased asthma severity. Exposure to indoor volatile organic compounds may be a trigger for asthma; formaldehyde exposure, for example, has a positive association. Also, phthalates in certain types of PVC are associated with asthma in children and adults. COUNT 4
QSN1 What are some of the enviromental factors that have been linked to asthma? ANS1 allergens, air pollution, and other environmental chemicals QSN2 What two things are associated with a greater risk of asthma-like symptoms? ANS2 Smoking during pregnancy and after delivery QSN3 What can cause symptoms and asthma serverity to change? ANS3 Low air quality from factors such as traffic pollution or high ozone levels QSN4 Exposure to what compounds can also trigger asthma? ANS4 indoor volatile organic compounds