Question

Which statement about ozone depletion and global warming is CORRECT ?

• A. Ozone depletion is mainly due to CO₂ emissions, while global warming is caused by CFCs.
• B. Ozone depletion increases UV-B reaching Earth, while greenhouse X gases trap infrared radiation causing global warming.
• C. Both are primarily caused by methane from agriculture.
• D. Global warming reduces the greenhouse effect, ozone depletion increases it.

Answer 1

Answer:

B. Ozone depletion increases UV-B reaching Earth, while greenhouse X gases trap infrared radiation causing global warming.

• Ozone depletion in the stratosphere, primarily caused by CFCs, reduces the protective ozone layer, allowing more harmful UV-B radiation to reach Earth's surface and increasing risks like skin cancer and ecosystem damage. Meanwhile, global warming results from greenhouse gases (CO₂, methane, etc.) trapping outgoing infrared radiation in the troposphere, creating the enhanced greenhouse effect.