The correct answer is: A. increased incidence of skin cancer.
Ozone depletion in the stratosphere will cause increased incidence of skin cancer because ozone absorbs most of the Sun’s ultraviolet radiation. When ozone is depleted, more ultraviolet radiation reaches the Earth’s surface, which can cause skin cancer and other health problems.
Option B is incorrect because forest fires are caused by a variety of factors, including drought, lightning, and human activity. Ozone depletion is not a major factor in forest fires.
Option C is incorrect because global warming is caused by the emission of greenhouse gases into the atmosphere. Ozone depletion is not a major factor in global warming.
Option D is incorrect because ozone depletion is a real and serious problem that can have a significant impact on human health and the environment.