Me too.....was having some breathing problems, esp. in winter.....so they said I had asthma....gave me an inhaler...which I hardly used, and then through away....I believe it was part of Menopause....yeah, I really mean that.....your hormones do weird things to you....got it all fixed now.
Now, as for CHILDhood asthma.....what about all the indoor carpet? Tightly built homes? Less time spent outside in fresh air? And, too much milk!
I agree with that. Include the isolation from farm living. I think I read that kids who grow up on farms has lots less asthma than city kids. My city kid husband had asthma as a child but has now outgrown it although he still has hay fever. I spent some time on a farm in my preschool years and no asthma.
And solid foods too soon.
I got asthma in my 40s (really have it, not pretend) from living in a valley that had a lot of plywood and particle board mills. Formadehyde in the air, big time. In fact, I later learned that valley has the highest incidence of asthma and related respitory complaints in the US.
I moved away, still have the asthma.