Sounds like you have a ventilation problem, buildings are required by code to get a certain amount of fresh air from outside so that CO2, VOCs, chloroform, etc

Sounds like you have a ventilation problem, buildings are required by code to get a certain amount of fresh air from outside so that CO2, VOCs, chloroform, etc don't get too high. Incidentally, NHTSA projects in 2100 CO2 will be at 789ppm [0] in the atmosphere, up from 410 today and 350 pre-industrial. And there are higher projections. One would assume that this would make ventilation more urgent, I guess building codes will have to be updated and existing buildings retrofitted. [0] https://www.washingtonpost.com/national/health-science/trump-administration-sees-a-7-degree-rise-in-global-temperatures-by-2100/2018/09/27/b9c6fada-bb45-11e8-bdc0-90f81cc58c5d_story.html https://www.washingtonpost.com/national/health-science/trump...