High levels of in the atmosphere can cause photochemical smog which can trigger respiratory problems.?

High levels of nitrogen oxides (NOx) and volatile organic compounds (VOCs) in the atmosphere can lead to the formation of photochemical smog, particularly in the presence of sunlight. This type of smog can contain ground-level ozone, which is harmful to human health. Exposure to photochemical smog can exacerbate respiratory issues, such as Asthma and bronchitis, and can lead to other serious health problems. Reducing emissions from vehicles and industrial sources is crucial to mitigating these effects.