I would assume the cost of making all existing apartments that well insulated (and actively ventilated to compensate), not just from the outside but from each o

I would assume the cost of making all existing apartments that well insulated (and actively ventilated to compensate), not just from the outside but from each other, is prohibitive. Raising standards for new construction sounds nice from a QoL and energy efficiency standpoint, but I’m not sure if the upfront costs or technical feasibility are there. And from your link - “Passive smoking has many downstream health effects—asthma, upper respiratory infections, other pulmonary diseases, cardiovascular disease—but only borderline increased risk of lung cancer”. I think that’s still more than enough to make one person’s smoke their (wall-sharing) neighbor’s business.