Thai state oil company PTT plc said the rising price of liquefied petroleum gas (LPG) will increase pressure on the state Oil Fund’s subsidy burden. PTT expects the LPG price to reach US$400 per tonne this year. (US$1 = 41 baht). Apisit Rujikeatkamjorn, PTT’s senior executive vice-president for the oil business group, said world LPG…