You have to pick one of them.
Nixon would be that one.
Untrue. You can praise him for signing legislation that would've been signed by literally any Democratic president, but it's simply incorrect to label him an environmentalist.
I'm not a fan of attaching the "-ist" label to presidents based on their signing of certain laws, but if we're looking at a legislative record, Nixon did things that helped the environmentalist movement more than it hurt it.
Whereas Trump believes that climate change is a conspiracy being pushed by the (((Chinese))).