The results of this section explicitly reveal that Singapore's fuel oil price and Thai currency exchange rate have direct impacts on natural gas price and electricity tariff in Thailand. Thus, it is obvious that the current situation of high oil price and the fluctuation of currency exchange rate in the past few years increase the volatility of Thailand's gas price. As natural gas has become a major fuel for power generation in Thailand for decades, it is necessary then to examine how high reliance on natural gas in power generation affects the Thai economy and thus this issue will be investigated in the following section.