I think the actual game is much harsher than this. You play as the main character and the game is really just about expanding the factory for the sake of expanding the factory. It serves no purpose other than making the factory bigger. You might be able to produce a little less pollution with solar but at the end, the game is about expanding the factory. You will cut down the forests, and pollute the environment, and pave over the beautiful landscape and the remove the homes of the natives that stand in your way. Why? Because it's what you do. It's factorio. It's slightly subtle, but not really. I think everyone realizes this is the backdrop of the game but you just keep building, and paving and polluting, because it's Factorio. It feels like it should be some moral lesson, I'm not sure what it is though. You just keep doing stuff and having fun.