Summer smog is also known as photochemical smog. It is created when sunlight mixes with hydrocarbons and nitrogen oxides in the
atmosphere. The result is a chemical change in the atmosphere that leads to smog formation, which can be of health concern. Lung
irritation and exacerbation of respiratory illness is common during smog events. What component of photochemical smog likely
contributes to the lung irritation?
A)ozone
B)methane
C)nitric acid
D)carbon dioxide