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Geography
Much of Arunachal Pradesh is
covered by the Himalayas. However. parts of Lohit, Changlang and
Tirap,which are covered by the Patkai. Kangto, Nyegi Kangsang, the
main Gorichen peak and the Eastern Gorichen peak are some of the
highest peaks in this region of the Himalayas.
In 2006, Bumla pass in Bomdila was opened to traders for the first
time in 44 years. Traders from both sides of the pass were permitted
to enter each other's territories.
The Himalayan ranges that extend up to the eastern Arunachal
separate it from China. The ranges extend toward Nagaland, and form
a boundary between India and Burma in Changlang and Tirap district,
acting as a natural barrier called Patkai Bum Hills. They are low
mountains compared to the Greater Himalayas.
Climate
The climate of Arunachal Pradesh differs with the elevation. Areas
that are at a very high elevation in the Upper Himalayas close to
the Tibetan border enjoy an alpine or Tundra climate. While below
the Upper Himalayas are the Middle Himalayas, where people
experience a climate which is temperate. Fruits like apples,
oranges, etc are grown here in this region. Areas at the
sub-Himalayan and sea-level elevation generally experience a humid
sub-tropical climate, along with the hot summers and mild winters.
Arunchal Pradesh receives heavy rainfall of 80 to 160 inches (2,000
to 4,000 mm) annually, most of it pours down between May and
September. The mountain slopes and hills are covered with alpine,
temperate, and subtropical forests of dwarf rhododendron, oak, pine,
maple, fir, and juniper; sal (Shorea) and teak are the main economic
species
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