CFCs are responsible for which environmental issue?

CFCs are responsible for which environmental issue?

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

Answer: (B)

Understanding how CFCs affect the atmosphere helps explain why they are linked to ozone depletion. In the stratosphere, ultraviolet light breaks CFC molecules apart, releasing chlorine atoms. Those chlorine atoms set off catalytic reactions that convert ozone (O3) into ordinary oxygen, thinning the ozone layer. With less ozone, more UV-B radiation reaches Earth's surface, leading to health and environmental risks. Among the given options, this issue specifically describes the impact of CFCs most accurately. Acid rain comes from sulfur and nitrogen oxides; global warming comes from increased greenhouse gases in the lower atmosphere trapping heat; air pollution is a broad term for many pollutants. So the most direct effect of CFCs is ozone depletion.

Understanding how CFCs affect the atmosphere helps explain why they are linked to ozone depletion. In the stratosphere, ultraviolet light breaks CFC molecules apart, releasing chlorine atoms. Those chlorine atoms set off catalytic reactions that convert ozone (O3) into ordinary oxygen, thinning the ozone layer. With less ozone, more UV-B radiation reaches Earth's surface, leading to health and environmental risks. Among the given options, this issue specifically describes the impact of CFCs most accurately. Acid rain comes from sulfur and nitrogen oxides; global warming comes from increased greenhouse gases in the lower atmosphere trapping heat; air pollution is a broad term for many pollutants. So the most direct effect of CFCs is ozone depletion.