Final answer:
Decreased air quality leads to numerous health issues including respiratory and cardiovascular problems. Air pollution can cause diseases such as asthma, bronchitis, emphysema, and increase the risk of premature death.
Step-by-step explanation:
When the air quality decreases, negative health effects occur, which include respiratory problems and cardiovascular issues. Air pollution is recognized as a major threat by the World Health Organization (WHO) and is linked to serious health problems such as asthma, bronchitis, emphysema, heart and lung diseases, allergies, cancers, and even premature death. People with existing health conditions, like asthma, are especially vulnerable to air pollution and must be particularly cautious to avoid exposure. Reducing air pollution can also lead to a decrease in these health issues, and one way to do this is by using less energy and switching to nonpolluting energy sources like solar energy.