You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "how many heat zones are there on the earth?" whose answer is three.
Each document should contain about 30 words, and these documents should contain useful information.

Query: common climate heat zones on earth
Useful Output:

Doc 1: A climate zone is a belt-shaped area of the earth with similar weather patterns. Factors that determine the average weather in a climate zone
Doc 2: The linked video gives a thorough insight into the 5 climate zones of the world: north/south polar zone, north/south temperate zone, and
Doc 3: Climate Zones ; A - Tropical Climates ; B - Dry Climates.
Doc 4: Hey kids, did you know that there are different climate zones of the Earth? Well, after watching this video, you'll not only get to know all
Doc 5: After polar climate, hot desert climates are the Earth's second-most common climate type covering over 14.2% of the planet's land area. The Dry