Table 2.
Environmental factor |
Extremely Low Frequency (ELF) radiation (power lines) Studies find elevated rates of childhood leukaemia, the most common childhood cancer, with effects seen within 600 m of power lines [43,44,46]. Analysis of the National Grid for England and Wales (using GIS) revealed < 8% population exposure within 600 m. |
Radio Frequency (RF) radiation (radio and TV transmitters) Inconsistent evidence for cancer effect [47]. Effects found within 10 km of the most powerful transmitters [48], of which there are approximately 20 in the UK. Population exposure < 10%. |
Radon Strong evidence found for association with lung cancer [49,50], and an estimated 9% of lung cancer cases in Europe are attributable to radon exposure [49]. However, datasets for different regions of the UK have been prepared using different methodologies and at different resolutions, and population exposure to radon levels above the Action Level of 200 Bq/m3 in England and Wales (highest resolution data) is < 4% (our own GIS analysis). |
Individual industrial pollutants Although there is evidence for the health effects of acute (accidental or occupational) exposure to specific hazardous chemicals [51], there is little or no evidence for their health effects at environmental levels. |
Nuclear facilities Evidence for an association with health is inconsistent and not strong [52,53]. A small proportion of the population lives in the proximity of the UK's 27 nuclear installations. |
Contaminated land The primary route of exposure for many soil contaminants is consumption of soil or contaminated vegetables [54], so << 10% population exposure. Mapping contaminated land for the UK is incomplete [55], and modelling human exposure to contaminants in soil is a highly complex process [56]. |