because Pres. Trump insisted that USA become self sufficient on energy, but Pres. Biden has already taken steps to quickly end that.
That's not really true. The pandemic has caused the oil market to be obliterated. What this means is that things like fracking are no longer cheap enough to be a competitor. That means the US cannot be self sufficient, at least in the short term.
Biden is also more focused on things like renewable energy sources and small nuclear power plants.
Let's face it, there's no perfect plan. Growing up in BFE PA, I saw the devastation caused by coal strip mining and other coal mining. I remember Pittsburgh back when it was the "steel city" and sooty and dark and smelly. Not sure I want to go back to that. On the other hand, I feel for those people in those areas, particularly as to jobs. If coal and fracking and manufacturing aren't there, what do people do? I don't know.
And the transition into renewable energy will take a while, and create its own associated costs.
