The document defines climatic regions as large areas that have similar climates. It describes five main climatic regions: the equatorial region near the equator which is very hot; the tropical region between the Tropics of Cancer and Capricorn; the desert region outside the tropics from 20-30 degrees latitude; the temperate region between the tropics and polar circles in both hemispheres; and the polar regions north of the Arctic Circle which have short summers and long winters.