Thinking ahead, as the atmospheric outdoor level keeps climbing, ventilation will become insufficient to achieve a desired target indoor level. Air conditioning

Thinking ahead, as the atmospheric outdoor level keeps climbing, ventilation will become insufficient to achieve a desired target indoor level. Air conditioning suffers from the extreme version of the same problem. Yes, the cost is substantial if using Soda Lime. Amines are traditionally used instead in a closed loop system, but they are corrosive and unsafe for use at home, although refrigerators and ACs too make use of similar loops. GPT says that some non-corrosive common amino acid salts can be used instead, but I find it difficult to believe.