As a part of a license, US Energy Initiatives, through sub licensee GreenGas, will convert a minimum of 10,000 buses from diesel to...natural gas systems over a five-year period...[It] has an exclusive license...to PS Natural Gas Co. Ltd Thailand...[which] has partnered with PTT Public Co. Limited, the distributor of compressed natural gas in Thailand; Kasikorn Bank...and Thai Transport Co Ltd...The use of natural gas in place of diesel eliminates a number of harmful pollutants, the company said.