Thursday, September 24, 1998 Published at 20:12 GMT 21:12 UK
Power line cancer claims 'alarmist'
Pollutants are said to be agitated by the cables
The electricity industry has hit back at claims that living near high-voltage power cables can cause cancer.
A team at Bristol University, led by Professor Denis Henshaw, unveiled its findings at a conference of international specialists in Bristol on Thursday
However, the claims were described as "alarmist speculation" by Dr John Swanson, a spokesman for the Electricity Association, the industry's trade group.
Many of the ideas in Professor Henshaw's research had been previously dismissed by the government's National Radiological Protection Board as "implausible and purely speculative".
"However, he has put forward some new ideas and it is for the science community to test these," Dr Swanson said.
"What we should not be doing is alarming people. It is wrong to cause anxiety and alarm.
"As a father with two young children I would have no qualms about living near a power line."
Dr David Jeffers, a spokesman for the National Grid, also doubted the Bristol research.
He said that other independent university researchers had tried and failed to replicate the team's results.
Professor Henshaw said there were "mechanisms" which increased exposure to environmental pollutants near high-power sources.
"We believe that pollutants in the air, notably from car pollution, are actually agitated by the effects of the power lines," he said.
He said that this happens "in a way which leads to an increased exposure to individuals under power lines".
Professor Henshaw denied there was a lack of evidence to back up his theories.
Professor Henshaw's team recently published results of experiments near a National Grid line in a farm field in South Gloucestershire, near Bristol.
The study concerned the attractive effect of the power cable on aerosols, airborne droplets carrying cancer-causing agents, viruses or bacteria.
Proximity affects risk
It showed an increased risk of exposure, the nearer a person moved towards the cable. The team said further research was needed to see if there was also an increased dosage risk.
The experiments were carried out in both summer and winter, but the results did not vary greatly despite the differing weather conditions.
The team suggested that the attractive effect on the aerosols may be the missing link between the cables and childhood cancers, such as leukaemia.
The Bristol conference closely follows a finding by the prestigious US National Institutes of Health that EM fields from power lines should be considered as possible causes of human cancer.