Agriculture and livestock are still the primary form of national economy, with 85% of the population dependent on the two. All other forms of economy including tourism, airline, manufacturing industry and mining are still in developing stage but cautiously expanding.
The export of hydroelectric power provides 25% of government revenue. Hydroelectric power is Bhutan's largest resource and is sustainable, renewable and environmentally friendly. Unlike other countries, the deep natural river valleys, make it unnecessary for large scale flooding for dams to build hydropower plants. Bhutan also exports calcium carbide, wood products and cement. Other major export is agricultural products such as apples, oranges, cardamom, potatoes, asparagus and mushroom.
Tourism and Airline, although very important for earning foreign exchange, only constitute a small part of the GNP.