Right, but taxing a CPU, PC Bus, and PC memory takes more electricity than doing the same amount of "work" on a GPU with longer, more specialized pathways, allowing more work on a single cycle, but less flexibility on the type of work. So if it takes 1hr fully taxing a CPU, PC bus, etc, vs 1 hour fully taxing a GPU and its integrated memory and bus, the one using the GPU is going to take more electricity. Also, you can chain GPUs which can't be done the same with CPUs since GPUs all have their own discrete bus and memory on a single card. Problem became that GPU production couldn't keep up with demand so they became more expensive for the hardware, but overall, the cost of electricity vs value of the blocks combined with producing fewer blocks on a CPU once the chains reach a similar complexity as a competing cryptocurrency, means that overall you're more likely to make more profit from GPU based mining than CPU based mining.

It's a complex calculation to figure out and many people mine without realizing the money they're spending on electricity, home cooling, and parts wear is more than they're making on the crypyo.

But as long as you pay for green energy none of that money will go towards supporting non-green infrastructure. So it should incentivise the energy companies to invest more into green ones.

I believe people getting non-green energy will just get less green energy, at least that's how I would imagine it if there was already enough green energy for the ones who demand it. Instead of making more green energy, they'll just send less green energy to the people that aren't paying for green energy. If your country doesn't produce a lot of it, then yea it'll certainly incentivise the production of it, but I feel like keeping green energy only for premium payers, without developping infrastructure is more worth it to them.