Why Deserts Form on the Western Sides of Continents

Contrary to the question's premise, major deserts are predominantly found on the western sides of continents. This pattern results from the rain shadow effect: prevailing easterly trade winds carry moisture from oceans onto eastern coasts, where it precipitates. As the air moves inland and descends on the western side, it warms and dries, creating arid conditions. Classic examples include the Atacama Desert (South America), Namib Desert (Africa), and the Sonoran Desert (North America).