Thanks for ansewering again.
However, my plans are that Scrap is useless. It has no uses, can't be burned for fuel or used as any ingredient. The point of scrap is that is is useless and the point of the mechanic is to make pollution a second enemy.
Oh, it's nice to get your POV, and i like the idea of making polution more relevent!
ATM, I do have 1 recipe that uses scrap as an ingredient. I have not released this yet but I have made a "garbagefill" tile, that is much like the landfill tile, except that it produces, rather than absorbs, pollution.
Sounds useful and hardcore. I'm guessing it would produce pollution at a small rate?
I'll let you know ;)