Because of its hilly terrain and poor transport infrastructure, Sikkim lacks a large-scale industrial base. Brewing, distilling, tanning and watchmaking are the main industries and are mainly located in the southern regions of the state, primarily in the towns of Melli and Jorethang. In addition, a small mining industry exists in Sikkim extracting minerals such as copper, dolomite, talc, graphite, quartzite, coal, zinc, and lead. Despite the state's minimal industrial infrastructure, Sikkim's economy has been among the fastest-growing in India since 2000; the state's GDP expanded by 89.93 percent in 2010 alone. In 2003, Sikkim decided to fully convert to organic farming and achieved this goal in 2015 becoming India's first "organic state".