Final answer:
Particulate matter is the air pollutant that has the most affect on people with heart disease.
Step-by-step explanation:
Of the air pollutants mentioned, the one that has the most affect on people who have heart disease is particulate matter. Particulate matter refers to solid particles and liquid droplets suspended in the air we breathe. These particles can be inhaled deep into the lungs and can cause respiratory and cardiovascular problems. Fine particles, in particular, have been linked to increased illness and premature death from heart and lung disorders.