The linked ScienceNews article reports that air pollution may contribute to allergies and asthma: "The airborne culprits are polycyclic aromatic hydrocarbons, or PAHs, the products of incomplete burning of fuel in diesel engines, furnaces, wood fires, wildfires and even barbeque grills."
In the Des Moines Register, Lee Rood reported: "About half the population has some allergy to mold. Even so, Iowa Department of Public Health officials tell me there is no state law aimed at protecting tenants from exposure. Most, if any, protection for tenants comes from local ordinances in the few cities that have them." http://www.desmoinesregister.com/article/20130825/NEWS03/308250069/Reader-s-Watchdog-Where-protections-against-mold-irked-tenant-asks?
As the rates of people developing food allergies, sensitivities, and intolerances rapidly soar; a growing number are having a more challenging time answering the question "What to Eat?" This social media story at Storify, told in tweets from a variety of perspectives, helps illustrate the human experiences that underlie the statistics.