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One-third of the Earth is covered in forests, which are primarily made up of trees.
A large portion of the
terrestrial biodiversity
of the planet, including insects, birds, and mammals, is found in forests. Temperate
forests, tropical forests, and
boreal forests
are the three main forest biomes (also known as the taiga). These
different latitudes where these forest types are found result in various climatic conditions. Close to the equator,
tropical forests can be found. They are warm and humid. Temperate forests are found at higher latitudes and
experience all four seasons. Boreal forests are found at even higher latitudes, and have the coldest and driest
climate, where precipitation occurs primarily in the form of snow.
Deserts are dry regions with less than 50 centimeters (20 inches) of annual rainfall. They occupy about
20% of the Earth's surface. Although the majority of deserts are found in subtropical regions, they can also be
cold or hot. Deserts do not have as much biodiversity as other biomes due to their harsh conditions. Any
vegetation and wildlife living in a desert must have special
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