Sweden is the first country to assess the risks of living under electric lines. According to a study conducted in it, it has been shown that there is a relationship between weak electromagnetic radiations and childhood leukemia. The source of these radiations were the high voltage electric lines, which indicate that the ratio is safe in a proportion of 80%. However, the lack of certainty of 100% hinders the establishment of regulations for the location of new homes because they are high voltage electric lines, whose costs can be taken into account.