WAEC Chemistry 2017 Paper

Concept:Chlorofluorocarbons ($\mathrm{CFCs}$) deplete the ozone layer, which protects the Earth from harmful solar radiation.Explanation:Ozone in the upper atmosphere absorbs most of the Sun's harmful ultraviolet radiation.When $\mathrm{CFCs}$ are released into the atmosphere, they rise and destroy ozone molecules.This creates a thinner ozone layer, often called an ozone hole.As a result, more ultraviolet light from the Sun reaches the Earth's surface.Increased ultraviolet exposure can cause skin cancer, eye damage, and harm to plants and animals.Answer:The correct option is A: excessive ultraviolet light from the sun to reach the earth surface.