Simplify the following text for a Grade 11 native English-speaking person.
Original: `` Epidemiological studies suggest that more than 500,000 Americans die each year from cardiopulmonary disease linked to breathing fine particle air pollution ... '' A study by the University of Birmingham has shown a strong correlation between pneumonia related deaths and air pollution from motor vehicles .
Simplified: Studies from the University of Birmingham showed that deaths because of pneumonia and air pollution from motor vehicles like cars are related .