Under climate we understand a group of permanent meteorological conditions that remain typical for a prolonged period. The term weather, in contrast, denotes only short-term meteorological changes lasting, say, for a day, a month, or even a season. The earth can be divided into four large climatic zones:
The polar zone is characterized by long, bitter and very foggy winters with considerable precipitation and cold summers with little sunshine.
The temperate zone characteristically has cool summers, moderately cold winters and frequent precipitation.
The subtropical zone is warm and sunny. Humidity is low, and there is little precipitation. The winters are short and mild.
The tropics are characterized by a hot, humid climate with intense sunlight (temperatures up to 36 °C with a mean humidity of 80%–90%).
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