Arunachal Pradesh covers 83,743 sq. kms. (roughly the size of Austria) and is characterised by mountains.
Much of the state is covered by the Himalayas, further parts by the Patkai.
Owing to a very sparse population and an underdeveloped infrastructure, much of the wilderness in Arunachal
Pradesh is in pristine condition. This makes it an ideal habitat for an abundance of creatures and plant life.
The climate of the three states is quite diverse, reflecting their differing geographical make-ups.
In Arunachal Pradesh climate varies enormously according to altitude.