Reducing the use of aerosol cans has contributed to a decrease in the destruction of which atmospheric feature?

• A. The greenhouse effect
• B. The destruction of the ozone layer
• C. Thermal pollution
• D. Acid rain

Answer: (B)

The concept here is that certain chemicals released from aerosol cans reach the stratosphere and participate in reactions that break down ozone molecules, thinning the ozone layer. When use of these aerosols decreases, fewer chlorine-containing compounds reach the upper atmosphere, so there are fewer chlorine radicals to destroy ozone. This means the ozone layer is less depleted and can recover over time, preserving its important role in absorbing harmful UV radiation from the sun. The other options don’t match this specific atmospheric process: the greenhouse effect is driven by long-lived greenhouse gases trapping heat, thermal pollution affects water bodies, and acid rain comes from sulfur and nitrogen compounds that aren’t the primary linkage with aerosol can use.