Detailed Instructions: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: This region of the atmosphere contains nacreous [NAY-kree-us] clouds, which are typically near the poles during cold seasons. Some scientists believe they can control climate change by injecting sulfate aerosols into this layer. Convection does not occur because of temperature inversion in this layer, whose coldest part is at its bottom, near the tropopause. The upper part of this region, which absorbs most of the ultraviolet light from the sun, is the ozone layer. Name this region between the troposphere and the mesosphere where most airplane flight takes place.
A:
Social Science