Create a new resource that spawns underneath some biter nests, or randomly if biters are disabled. The bio lab must be placed on this resource and will output biomass. Creep tiles will be removed.

It would be cool if you had to supply materials for the bio lab to produce biomass, instead of it just being a mining drill. The bio lab would consume the materials and the biomass resource. This would require you to ship the needed materials out to the mining site, making for some interesting logistical challenges.