He can continue to propagandize the lie to reduce people's belief in changing is good(and has), change laws to benefit oil companies (and has), and cause wars over oil(and has). Seems like he has plenty he can do to make the current situation worse.
What you refuse to understand is all that you cited even if absolutely true would have had an impact unmeasurable with what tools we have at the moment.
Do you understand the word "unmeasurable"?
It means that whatever value you assign to that particular trump variable is so below the noise that it does not matter, can not matter, and anyone pretending it does is a manipulator; a crook.
And all that amounts to a tiny footnote in the carbon bookkeeping as long as people drive ICE cars, travel by air, eat beef, and heat or cool their homes with gas or coal or oil. But also, the economy at large is transitioning and there’s little that Trump can do about it. There’s no future in fossil fuels and Trump can’t change that. At best he can divert some money to his fellow crooks in the short term.