The current admin tries to portray themselves as "strong man" but have the thinnest of skins. It is likely the EPA bosses don't want any studies which oppose their agenda. Be it renewables or coal mining. Don't follow the science, follow the agenda.

Case in point - https://www.youtube.com/watch?v=WBllzAb_vAk

Kevin Hall's study didn't find ultra processed foods being addictive like cocaine. It seemed to have rubbed the RFK MAHA agenda the wrong way.