The GrEEEn City Action Plan (GCAP) is an initial step towards putting Mueang Songkhla and Hat Yai municipality on a path to become GrEEEn Cities. The Indonesia-Malaysia-Thailand Growth Triangle (IMT-GT), a sub-regional economic cooperation program aimed at spurring economic development in participating provinces and states in the three countries, has prioritized sustainable urban development. The National Economic and Social Development Board (NESDB), aiming to promote Thailand’s national agenda towards developing ecocities, and as a participant in the IMT-GT, is also keen for Songkhla and Hat Yai to become pioneer GrEEEn Cities in the region.