, the Galkynysh Gas Field was estimated to possess the second-largest volume of gas in the world, after the South Pars field in the Persian Gulf. Reserves at the Galkynysh Gas Field are estimated at around 21.2 trillion cubic metres. The Turkmenistan Natural Gas Company (Türkmengaz) controls gas extraction in the country. Gas production is the most dynamic and promising sector of the national economy. In 2009 the government of Turkmenistan began a policy of diversifying export routes for its raw materials.