risks posed by emr from appliances that we have been using for decades in the absence of studies according to who even between apparently similar devices the strength of the magnetic field may vary a lot for example while some hair dryers are surrounded by a very strong field others hardly produce any magnetic field at all these differences in magnetic field strength are related to product design the actual exposure levels vary considerably depending on the model of appliance and distance from it some experts warn about the perils of living in a sea of microwaves dr p n renjen senior consultant neurologist at indraprastha apollo says i think there are some changes taking place at the dna level referring to the studies by henry lai a biologist at university of washington who found that rats exposed to radiofrequency radiation had damaged brain dna renjen adds dna damage means it will affect the entire cell replication system he says theres compelling evidence of deafness and memory loss caused by wifi all experts stress the need for more studies but emphasize the need to protect the ones who are most at risk growing tissue is most susceptible to environmental factors pregnant women and children would be right on top of the atrisk from emr list says dr kishore its not possible to junk our mobiles and microwaves etc we cannot live without them so the real challenge is in finding a balance between the potential and hazards of technology