Bio Residue

Byproducts: nearly every recipe now leaves waste behind, so recipe pages list byproducts alongside ingredients.
Garbage &amp; recycling: waste sorts from mixed garbage down to pure materials, and can be recycled back into stock.
Pollution has four kinds: acid rain, chemical, soil and heavy mineral, each settling into the ground differently. Pollution guide &rarr;
Modules reworked: upgrades are now Basic / Advanced / Modern / Specialty , one per slot, driving the same bonus system as talents. Module guide &rarr;
Fresh water: machines need it &mdash; water drawn from the ocean has to be desalinated first.

Recovered bio residue from a sorting process.

Weight15000 gMax stack10Carried on back

Notes

Bio Residue is a garbage byproduct recovered from industrial sorting processes, and it can be excavated from the environment where it accumulates. While it is a solid, diggable block that players can carry on their back in stacks of up to 10 units (each weighing 15 kg), its main value is as an ingredient in mid-game recipes such as Agriculture Research Paper Modern, Bio Gasoline, and Compost Bio Residue. A practical tip: because it is tagged as both an Ingredient and Garbage, stockpiling it for later processing avoids cluttering your base while keeping a useful material on hand for fuel or research.

Notes are AI-generated and may be imprecise.