Question

Why are most of the world's deserts located in the western margins of the continents in the sub-tropics?

Answer 1

As sun sets in West then due to biological atmospheric changes deserts are formed

Answer 2

Answer:

Most of the worlds deserts are located in the western margins of continents in the subtropics because the prevailing winds in the tropics are tropical easterly winds. The tropical easterly winds become dry by the time they reach the western margins of the continents and so they bring no rainfall.