"...suspicions that LF frequencies can be physiologically damaging." For little more than a hundred years we've had various waves of one sort or another in the air, radio, radar, mobiles, nuclear emissions etc. And the twentieth century has the highest incidence of cancers, but scientists deny any links. Scandinavia is the most cautious country regarding the siting of overhead power lines despite no conclusive proof that there might be a problem, so I think I will have to use a cabled mower for a while yet then.
All I was pointing out is that Scandinavians in general seem to be more of the belief that the man made magnetic fields of the 20th century has increased the incidence of cancers or physiological disorders. None of it is proven as far as I know, but does that mean that all Swedish scientists are overly paranoid?
that the 20th century had the highest incidence of cancers. For a start there's no way of knowing how many people died of cancer in the past. Autopsies were not routinely carried out until late in the 18th century, and before that many people must have died of cancer without ever knowing what made them ill.
Cancers have probably been around as long as we have - there is certainly evidence that the ancient Egyptians knew about them.