Thailand requires additional investment in the infrastructure in power generation, transportation, manufacturing industries, and buildings. In the power sector, the present worth of the power system cost will be increased by 62.0 % compared to the BAU level (see Table 3-2). The natural gas power plants with CCS and bio-energy with CCS require the highest investment in 2050, followed by wind and solar powers. The transport system cost will be increased by 16.2% compared to the BAU level. Electric trucks and electric pick-ups will account for the highest share of investment followed by electric buses and trucks. In the manufacturing industries, the energy efficiency improvement in the heating and the motor systems and the deployment of CCS require the highest investment in the non-metallic and the chemical industries in 2050. The manufacturing industries system cost will be increased by 15.3% compared to the BAU level. The heating systems, cooling systems, and the installation of solar water heating systems require the highest investment in the building sector; however, building sector shows almost unchanged investment compared to the BAU level because of the reduction in technology prices and greater use of the energy efficient technology during 2030-2050.