[graeme]

Sure, but it's not nearly as costly as you'd think. We pay for all kinds of things. Including, compared to the past, much warmer air in the winter and much cooler air in the summer.

Growing up we used to put on sweaters, wear shorts, use fans, have the windows open in a car.

Changing our heating/cooling preferences to get rid of all that costs money. People don't mind.

But somehow, spending a small bit to breathe well and avoid indoor pollution/viruses is beyond the pale.