Multipurpose dam on the Pattani River in southern Thailand
Courtesy World Bank

Historically, the population has had adequate supplies of fuel in the form of wood charcoal, which was usually available for the taking from nearby forests and thickets. Until the midtwentieth century, the chief energy source for the country's limited industry was wood, supplemented by rice husks and bagasse (the dry pulp remaining from sugarcane after the juice is extracted). Even into the 1960s, wood was a major source of fuel for the railroads. Electricity, which was used for power beginning in 1887 with the establishment of the Siam Electric Company, was generated as late as the early 1950s largely by steam produced through burning rice husks. Other natural energy sources existed, although they were underexploited, in the large hydroelectric potential of the Chao Phraya and to a lesser extent of the Mae Klong and other smaller rivers. There were also deposits of lignite, which was used to fuel a number of power plants. Since 1950 small oil deposits have been found and exploited in the North. Oil shales have also been discovered, but exploitation remained economically unfeasible in 1980. The greatest potential for domestic hydrocarbon production in the late 1980s consisted of large natural gas deposits, which had been discovered in the 1970s in the Gulf of Thailand.

Data as of September 1987