I have severe asthma caused by three days of high level exposure to spray on foam roofing and sealant (Carboline Inc) at Long Beach Junior High in Mississippi where I was teaching. <http://www.toxicjustice.com> Even so, I'd rather have asthma than cancer. Cancer from exposure to chemicals and poor environments may not show up for a decade or more, but asthma can result almost immediately after exposure.
We have to be sure we don't throw the baby out with the bathwater.
Getting the vermin out of Boston’s public housing may have improved living conditions in more ways than one: With the move has come a sharp drop in asthma symptoms among residents.
Read more: http://www.bostonglobe.com/lifestyle/health-wellness/2013/01/01/rodent-reduction-boston-public-housing-linked-lower-asthma-rates/qW6RawaGPWWPb7eN8fcdTL/story.html