Nothing stops Congress from included in law that the executive branch agency specifically has the authority required to define and enforce specific metrics. The

Nothing stops Congress from included in law that the executive branch agency specifically has the authority required to define and enforce specific metrics. The problem Chevron crested was the situation where congress effectively just approves an agency with broad powers to protect the environment, and from there the EPA does basically whatever they want with little to no accountability. Neither extreme is ideal. What we should really have is congress passing laws that specify scope of authority and agencies that have been granted enough leeway to do the job effectively without having the power to effectively create law completely outside the balance of powers.