Source: http://www.greenwavefilters.com/wordpress/asthma/

Over the past thirty years, there has been a huge rise in the incidence of asthma.  There is evidence to suggest that exposure to dirty electricity, which has also increased dramatically since the mid-1980s, may be a contributing factor in the growth of this ailment.  Researchers believe the correlation between dirty electricity and asthma may be akin to an allergic reaction.  Dr. Olle Johansson, a noted researcher at the Karolinska Institute (home of the Nobel Prize), suggests that electrical fields, such as those created by dirty power, trigger our immune systems to release inflammatory substances such as histamines and cytokines as a protective mechanism.  These markers of inflammation have been shown to highly correlate with asthma and other allergic reactions.

The good news? Reducing exposure to dirty electricity may help alleviate asthma symptoms, especially for individuals who are particularly sensitive to this form of electro-pollution.  One research study in a Wisconsin elementary school showed that asthma symptoms nearly disappeared when high levels of dirty electricity were reduced in classrooms.  Of the 37 students at the school using asthma inhalers at the time of the study, only three continued to need them (and only in preparation for vigorous physical activity) once dirty electricity was reduced.

Source: http://www.greenwavefilters.com/wordpress/asthma/