Question

multiple choice question chemical reactions leading to the yearly destruction of ozone occur when clouds form over antarctica due to ______ a drop in air temperatures nearby volcanic eruptions an increase in greenhouse gases reflection of the suns rays that occurs only at certain angles realized twice a year

Explanation:

In Antarctica, when air temperatures drop, polar stratospheric clouds form. These clouds provide a surface for chemical reactions involving chlorine - containing compounds (from substances like CFCs) to occur, which lead to the destruction of ozone. Volcanic eruptions, increase in greenhouse gases and the specific reflection of Sun's rays are not the main reasons for the ozone - destroying chemical reactions when clouds form over Antarctica.

Answer:

a drop in air temperatures