The virulent anti-environmental policies of the current administration were going to happen under any Republican president; the GOP is after all just a fully owned subsidiary of resource extraction companies. The US House and red states have been passing bills and riders of this ilk for years now (much of it written by ALEC.) That Trump is rubber stamping this is no surprise, but it would not have been any different if Rubio or Romney were president (which is not to say Trump isn’t far worse for any number of other reasons.)
Edit: Quoting a post from a different forum that summarizes the impact of the EPA gag order.
Alright, so two things are happening here.
First, “a temporary suspension of new business activities at the EPA, including issuing work assignments to contractors” means that they have basically halted all EPA activities. The administration has crippled the EPA.
Second, the gag order makes it illegal for them to talk to anyone about it.
Aside from the aforementioned planned shift to have the agency go through the White House for future communications, what does halting all EPA activities mean, at this moment?
The Clean Air Act, the Clean Water Act, and the Endangered Species Act now have no primary regulatory or enforcement body. Let that sink in for a minute.
The EPA, their primary regulatory and enforcement body, isn’t taking any new business.
That means that for the time being, any violations will not be subject to primary scrutiny or enforcement. Secondary Organizations can’t step up because the EPA still technically exists, so it can’t automatically be bypassed thanks to procedural rules. As long as this order stands, State EPAs are the thin Green Line in terms of protecting the environment. But that’s dependent on not only the strength of the EPA state by state, but each state’s corresponding Environmental Regulations, as the State EPAs won’t be able to enforce on Federal Statutes due to the EPA still technically existing.
It’s really bad. Like really bad.