Someone or something apparently told Donald Trump that his record on the environment might cost him a state or two. He's now out talking about how great he's been in that area where, of course, he hasn't been great or even not-terrible. His credo has been to never do anything that would interfere with any company making as much money as possible, no matter what air gets polluted, what stream has toxic matter dumped into it, what lower-paid employee gets ill from working the mines, what it does to our climate, etc. I find it hard to believe that will ever change except maybe in token ways for show.
So as Rebecca Leber describes, he and his minions are out there with lists of his accomplishments in this area. They're pretty short lists and not particularly accurate ones.