Describe the natural conditions typical for different light belts.

The tropical belt lies between the tropics. Within its limits, the Sun is twice a year at its zenith, in the tropics – once a year, on the days of the solstices (and this is how they differ from all other parallels). At the equator, day is always equal to night. At other latitudes of this belt, the duration of the day and night varies little throughout the year. The hot belt occupies about 40 percent of the earth’s surface. The temperate zones (there are two of them) are located between the tropics and the polar circles of the corresponding hemisphere. The sun in them is never at its zenith. During the day, there must be a change of day and night, and their duration depends on the latitude and time of the year. Near the polar circles (from 60 to 66.5 degrees latitude), bright white nights with twilight lighting are observed in summer. The total area of ​​the temperate zones is 52 percent of the earth’s surface. The polar belts (there are two of them) are located north of the North and south of the South polar circles. These belts are distinguished by the presence of polar days and nights, the duration of which gradually increases from one day at the polar circles (and this is how they differ from all other parallels) to six months at the poles. White nights are observed at the beginning and at the end of polar nights for 2-3 weeks. The total area of ​​the cold zones is 8 percent of the earth’s surface.