What harm can high levels of ground-level ozone cause?

• A. Enhanced plant growth
• B. Respiratory issues in humans
• C. Improved soil quality
• D. Decrease in asthma cases

Answer: (B)

High levels of ground-level ozone can lead to significant respiratory issues in humans. This gaseous pollutant forms when sunlight reacts with pollutants from vehicles, industrial facilities, and other sources. Once inhaled, ground-level ozone can cause a range of health problems, particularly affecting the lungs. It can lead to symptoms such as coughing, throat irritation, and exacerbation of asthma, as well as decline in lung function and increased risk of respiratory infections.

Additionally, ozone can aggravate pre-existing conditions, leading to more severe health issues for vulnerable populations, including children, adults with chronic respiratory diseases, and the elderly. Understanding the health impacts of ground-level ozone is crucial for establishing regulations and public health policies to protect individuals from air quality-related health risks. The other options, such as enhanced plant growth and improved soil quality, misrepresent the effects of high levels of ozone, as the pollutant is actually harmful to vegetation and ecosystems.