It's unfortunate that the EPA is under attack by conservatives who want limited government. If you start from first principles about what the min viable government should do, a big part of its charter would be to prevent major tragedies of the commons. And the environment is a textbook example of something that'd suffer the tragedy of the commons without government oversight.

I prefer a bigger government with a bigger social safety net with universal basic healthcare, etc. But I can understand conservative opposition to that; at least those don't produce tragedies of the commons. (They arguably do to a lesser extent: if people's basic needs are met, they're less likely to resort to crime to fulfill them. And a greater rate of crime is a tragedy for all; ask anyone who's paid a premium to live in a "safe" neighborhood.)