An environmental group has threatened to file a lawsuit against state-run oil and gas firm Pertamina over its reported plan to use toxic chemical as an additive in its fuels. The Committee Against Leaded Gasoline (KPPB) was reacting to the recent announcement of a tender from Pertamina…to supply methyl tertiary-butyl ether [MTBE ]…[T]here is evidence…[ that MTBE] poses risks to the environment and to public health…Mochamad Harun, a Pertamina spokesman, said the company had never used MTBE for its fuel. He added that the additive was being sought for experimental activities...“…However, MTBE is not banned for use….So we’re not violating any regulations...However, we will…consider their objections."...