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Right now, you’ve got two real choices for Using CO2: Slickster conversion to petrol or dirt generation through carbon skimmers. Slicksters are fun but the numbers needed to process a meaningful quantity of CO2 are a giant FPS hit. Dirt is great but at some point you have enough for farming, and composts are labor intensive. So: what if oil wells, in addition to accepting water, also accepted liquified CO2? This is done in real life (https://en.m.wikipedia.org/wiki/Enhanced_oil_recovery) the liquification requirement, especially given oil biome tends to be hot, gives an interesting infrastructure challenge.
The ethanol fuel production line with one generator and 4 distilleries produces 1.16668 kg/s of CO2, which is immense. To put it in perspective, this is the CO2 production of 583.34 dupes, and requires 36 tamed slicksters to consume it all. It also can be done with 480 watts of power with 4 carbon skimmers running full time. Unless you make the whole area around it airflow, it will quickly pressurize the area to 5 kg, and that will keep rising, requiring pressure suits to even access your power center. This is crazy, when if you think about it, you're almost required to spend the 480 watts which brings the net power before tune up down to 560 watts only, for that much setup! (2kW from the generator - 960 for the distilleries - 480 for the scrubbers = 560 W) 2 Coal generators on the other hand produce 0.04 kg/s of CO2, the same amount as 20 dupes. and they produce 600 W. Is it really intended that Ethanol be such a trap for new players, to flood their base with CO2 and prevent O2 production from over-pressurization of CO2? I've seen so many new players on Twitch jump into it, and either kill their base, or nearly kill their bases on CO2. Heck, I nearly did that once before I ran the numbers. The wood burner falls into the same problem, but to a lesser extent, simply because most players don't stick with them for long.