This echoes generic fear mongering of regulation from the conservative side. The EPA operates according to specific rules, it's not just out there making random policies. Legislation creates the mandate, they promulgate within the law. What does "but will it always" do good things even mean? What are some bad things the EPA has done in your mind? Saying the government shouldn't have the power to regulate emissions that are destroying the biosphere is absurd. There's no right to ICE vehicles in perpetuity enshrined in the constitution. If the EPA ever start doing truly asinine things, then we elect leaders to change the laws dictating their mandate. This is just basic democracy stuff.