What current environmental problem is linked to CFCs and HCFCs?

• A. Ozone depletion
• B. Global warming
• C. Acid rain
• D. Water pollution

Answer: (A)

CFCs (chlorofluorocarbons) and HCFCs (hydrochlorofluorocarbons) are primarily linked to ozone depletion, which is a critical environmental issue. The ozone layer, located in the Earth's stratosphere, acts as a protective shield against the harmful ultraviolet (UV) radiation from the sun. CFCs and HCFCs release chlorine and bromine gases when they break down in the atmosphere, which then reacts with ozone (O3) molecules. This reaction leads to the thinning of the ozone layer, allowing increased UV radiation to reach the Earth's surface, which can have serious consequences for human health, ecosystems, and wildlife.

While global warming, acid rain, and water pollution are significant environmental concerns, they are not directly related to the impact of CFCs and HCFCs. Global warming is more closely associated with greenhouse gases like carbon dioxide and methane, whereas acid rain results mostly from sulfur dioxide and nitrogen oxides. Water pollution encompasses various contaminants and does not specifically involve the compounds in question here. Thus, the association of CFCs and HCFCs with ozone depletion is the most accurate and relevant response concerning their environmental effects.