Many cities use the path of power lines and towers as green spaces adding trails to encourages people to run, walk, skate, bike on them. There are benches along the way for people to sit and relax. All this is happening just under the lines that carry an electromagnetic field.
A 2019 study published by the National Library of Medicine revealed the following: “we found that those living within 500 meters of the lines carry a four-fold risk (OR 4.44, 95% CI 2.77 to 7.11) developing infertility compared with those living more than 1000 meters away from the lines .” (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6522214/). Admittedly, this study focuses on people who live within 500 meters (about 1,600 feet) of the lines, not the effects of repeated, extremely close exposure of those who spend time 100 feet under the lines. If these lines carry a 4 fold risk of developing infertility problems, spending time directly under them should be out of the question!
There have been many studies looking for cancer correlation in proximity of powerlines and no correlation has been found. That however, does not mean that repeated exposure to an EMF will not have many other negative health consequences as stated in this article. Learn, Improve, Repeat!