Add even more waste: Agriculture produces bio-waste

i really love the waste management part of the game, which let you treat the waste of one process as a valualbe recource of another process.
in that context, i'd be really happy, if you could add bio-waste do the farms, so you could process things like fibers, rot and so on into other stuff e.g. compost, bio-plastics...
i just mean, look at real farms and you'll be shocked how much bio-"waste" is produced at such places and what creative people make out of that kind of stuff ;)