If you are old enough, you remember the big scare in the
late 1980s about power lines causing cancer.
In fact, if you are not old enough to remember the news reports of the
time, you have probably heard about this idea from someone who was. There was a great deal of concern, but after
over 30 years of further research, it appears to have been a mistaken assumption. Still the fear persists.
The fairly short (7:46) NY Times Retro Report is worth
watching.
It begins with replays of news reports from all the major
networks from 1987. It was big news at
the time, and this flashback is very informative in retrospect showing how the
news business operates when breaking news has the potential to stir up a lot of
fear based on a very limited study. A
voice-over talks about how power lines may cause cancer while showing the
picture of a small bald child, apparently battling cancer (but not from power
lines) – sneaky. When seven children in
one Denver school developed cancer and parents blamed it on nearby power lines,
one reporter says that it could be a “tragedy of enormous proportions.”
The Times calls the episode “Power of Fear” with the message
that once this type of fear is introduced into our society it never really goes
away.
The researcher who first suspected the problem now explains
that further research has ruled out any problem. With the number and density of power lines,
this should have developed into a major health problem, but it didn’t. “That suspicion (of a cancer risk) was simply
wrong...The likely impact (of power lines) is zero.” Scientists in the 1990s conducted hundreds of
experiments exposing rats, other animals and human cells to intense EMFs
(magnetic fields around the power lines) over long periods of time with no
change in the cells. “In 20 years of
looking, no one has found a way that power line fields can do anything at all
to cells of animals; unless it can do something to cells, it cannot cause
cancer.” The National Academy of
Sciences confirmed this by reviewing 500 studies and releasing their findings
in October 1996. Nothing since then has
altered the conclusion of no danger.
The association was always “suggestive, but very faint” but
correlation does not prove causation.
Yet the idea, the fear, persists and is still spread by some public
figures, some advertisers who use the scare tactics to sell real estate service
and by word of mouth – now with the added power of social media.
Why do some Americans believe these sources and continue to
fear the presence of power lines?
Psychologists tell us that risks that are invisible, that might cause
suffering before death or that might affect children have uncanny staying
power, even in the face of firm evidence to the contrary. This highlights the need for critical
thinking, to put aside emotional responses and listen to the facts. Don’t we have enough stuff to be afraid of
without dredging up errors from the past?
No comments:
Post a Comment
Click again on the title to add a comment