You haven't heard people say we should burn less fossil fuel, and use more solar, wind and nuclear energy? That people should have better insulated homes? That we should fly less and eat less meat? That we should plant more trees? That large corporations exploiting externalities should be better regulated?

If that's the case, you might want to read "sustainable energy without the hot air" [1] which is available free online. It's slightly dated with regards to the cost of solar panels, but a good introduction to the area IMHO.

[1] https://www.withouthotair.com/