"Poor air quality, which can be influenced by a variety of fumes, chemicals and allergens, is arguably the leading cause of triggers for most asthmatics in urban areas"

This quote by Ian Smith recommends that poor air quality is the main reason for asthma triggers in metropolitan areas. Poor air quality can be brought on by a variety of sources, such as fumes, chemicals, and irritants. These contaminants can cause inflammation in the respiratory tracts of asthmatics, leading to problem breathing and other symptoms. This is specifically real in urban locations, where air pollution is typically higher due to the increased number of vehicles and factories. Poor air quality can also cause other health problems, such as respiratory infections and heart disease. It is very important to take actions to decrease air contamination in order to safeguard the health of asthmatics and other vulnerable populations. This can include minimizing emissions from cars and factories, in addition to planting trees and other plant life to assist filter the air.