Which of the following is a health impact of photochemical smog?

Photochemical smog is a type of air pollution that occurs when sunlight reacts with pollutants such as volatile organic compounds (VOCs) and nitrogen oxides, leading to the formation of ground-level ozone and other harmful substances. One of the significant health impacts of photochemical smog is eye and respiratory irritation.

Exposure to the components of smog, particularly ozone, can cause various health problems. For instance, individuals may experience symptoms like sore throats, coughing, shortness of breath, and eye irritation. This occurs because airborne pollutants can inflame and irritate the mucous membranes in the eyes and respiratory tract, leading to discomfort and exacerbating existing health conditions such as asthma and chronic bronchitis. Public health guidelines often warn vulnerable populations, including children and the elderly, to limit exposure to smoggy conditions due to these health risks.

In contrast, the other options presented do not accurately represent the health impacts associated with photochemical smog. Reduced agricultural output may occur due to the effects of smog on crops, but it is not directly a health impact on humans. Improved visibility contradicts the general effect of smog, which tends to reduce visibility due to the haze and particulate matter it contains. Increased photosynthesis in crops is also