No, we have zero need to prove any such thing.
One hundred percent of the things done by the EPA which are actually needed duplicate things done by state agencies.
It is in every way redundant.
I would say air pollution an is a national problem. Other than that you’d be right. The EPA has cleaned up the air. Since I was a kid in the 60’s it is night and day. But they have grown onto a maniacal beast. Just go back to clean air and water and nix everything else they are into like “climate change”.