Foreign sources placed Bhutan’s population at 2,094,176 in 2002. However, the official 1990 estimate by the Bhutanese government gave the country’s population as about 600,000.
Bhutan's climate is as varied as its altitudes and, like most of Asia, is affected by monsoons. Western Bhutan is particularly affected by monsoons that bring between 60 and 90 percent of the region's rainfall.
Bhutan has four major river systems flowing swiftly out of the Himalayas that are regularly fed by glaciers in northern Bhutan.