Certified in Public Health (CPH) Practice Exam

Which is a possible consequence of increased particulate matter in the atmosphere?

1. Enhancement of plant growth

2. Decrease in respiratory health

3. Reduction in airborne diseases

4. Improvement of atmospheric visibility

The correct answer is: Decrease in respiratory health

Increased particulate matter in the atmosphere is primarily linked to a variety of negative health outcomes, particularly concerning respiratory health. Particulate matter consists of tiny particles and droplets that can be inhaled into the lungs, leading to serious health issues. These particles can cause or exacerbate conditions such as asthma, bronchitis, and other respiratory diseases. When particulate matter levels rise, it can lead to inflammation of the airways and decrease lung function, contributing to more frequent hospital visits and health complications. This is particularly harmful to vulnerable populations, such as children, the elderly, and individuals with pre-existing health conditions. The other options do not accurately reflect the typical consequences of increased particulate matter. For instance, while some might think that particulate matter could enhance plant growth due to nutrient content, the negative impacts on air quality and resultant health issues far outweigh any potential benefits. Similarly, particulate matter does not reduce airborne diseases; in fact, it can contribute to the spread of respiratory infections by impairing lung function. Lastly, increased particulate matter tends to worsen atmospheric visibility rather than improve it, as the particles can scatter and absorb light, making the air appear hazy.