The climate zones circle the globe between the equator and. tile two poles. The torrid zone includes the equator and lies between the Tropics of Capricorn and Cancer, about 23 degrees north and south of the equator. The two temperate zones extend from the tropics to the Arctic and Antarctic Circle.. Within the polar circle lie tree frigid zones.

The two temperate zones are about 4.3 degrees wide. In these two belts of moderature climate, north and south of the equator, lives most of the world's human population.