排烟筒（污染排放），有害气体排放会添加大量污染 designed to safely dispose of various industrial gases and fluids by flaring/burning them, with pollution emissions scaled to the toxicity and type of fluid being processed.
Mods introducing new content into the game.
Counted when a user downloads a mod release for the first time. Before Nov 2021 it counted everytime a user clicked the mods download button.
Counted when a user downloads a mod for the first time. Has no data before Dec 2022