The risk of lung cancer attributable to air pollution, in particular fine particles (PM2.5), the most relevant indicator of air pollution, has been estimated to be 10.7% in Europe, corresponding to 20,942 cases in men and 6,112 cases in women annually.
This figure corresponds to 1.9% of all cancer in men and 0.7% in women. Radon is another carcinogen present in indoor air, which may be responsible for 4.5% of lung cancer cases. This figure corresponds to 8,807 cases of cancer in men and 2,570 in women. The author also found that there may be an increased risk of bladder cancer due to water chlorination by-products. The available evidence of a risk of cancer caused by exposure to other environmental pollutants such as pesticides, dioxins and electromagnetic fields is inconclusive. Nevertheless, the author calls for great caution when interpreting the available evidence, due to different uncertainties in the components of such quantifications.
For example, it is unknown whether PM2.5 represents the measure of air pollution relevant to its carcinogenic potential. They should be considered indicators of the possible order of magnitude of the risk based on current knowledge. More research is needed in order to provide more evidence of the cancer risk from certain pollutants. Overall, the available evidence suggests that of all the above-mentioned environmental pollutants, outdoor air pollution and indoor radon exposure are the greatest causes of pollution-related cancer in Europe. The results from this study highlight that air pollution continues to be a serious problem in Europe despite policy efforts. New policies aiming at controlling emissions of air pollutants may be necessary to further protect human health.
Source: : Paolo Boffetta (2006) « Human cancer from environmental pollutants: The epidemiological evidence », Mutation Research/Genetic Toxicology and Environmental Mutagenesis, 608(2): 157-162. Contact: firstname.lastname@example.org
Posted on 14th November 2006
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