by Melissa Roper
It is not yet certain if climate change is the result of anthropogenic-sourced carbon emissions or, on the contrary, is a Sun-influenced phenomenon. As the debate on global warming versus global cooling continues, results of recent research draw attention towards an equally worrying side-effect of industry greenhouse gas emissions – the fatal implications of air pollution on human health. Earlier this month, 24 experts from 11 countries met at the International Agency for Cancer Research (IARC) headquarters in Lyon to assess the correlation between cancer and air pollution. IARC is the cancer specialized agency of the World Health Organization (WHO), the coordinating authority for health within the United Nations.
Cancer and air pollution: two widespread phenomena
The scientists evaluated over 1000 papers analysing the carcinogenicity of particulate matter and transport-related pollutants, and the results of the study will be published as Volume 109 of the IARC Monographs. According to the study’s Press release published on 17th October 2013, “outdoor air pollution [is] a leading environmental cause of cancer deaths”. This conclusion is the first paper to officially link the two: both the worldwide rate of cancer and global air pollution have become alarmingly widespread phenomena in the past decades. Cancer has become so common, that the international medical industry was revolutionized in order to address the problem in evermore effective ways. As Licensed Prescriptions explain, it has become possible to diagnose, prevent and treat cancer quickly, in some cases even without the need of a biopsy. One of the reasons why cancer has become such a frequent problem may be that “the air we breathe has become polluted with a mixture of cancer-causing substances” as summarized by Dr. Kurt Straif, Head of IARC Monographs.
Sources and effects of air pollution
The IARC study reports that although air pollution comes from a mixture of natural and anthropogenic sources, “the predominant sources of outdoor air pollution are transportation, stationary power generation, industrial and agricultural emissions, and residential heating and cooking. Generally, the burning of fuels – oil, coal, gas or wood – release elements such as particulate matter, carbon monoxide, sulphur oxides, and metals (lead, in particular) into the air. Humans breathe in these particles, which get stuck in the lung tissue and produce breathing affections and cancer on the long term.
South Africa air pollution
The University of Western Cape’s Biodiversity and Conservation Biology Department (BCB) also discusses air pollution, stating that “pollution from exhaust gases of vehicles is responsible for 60% of all air pollution and in cities up to 80%”, with lead being one of the most dangerous chemicals emitted by the transport industry. Combustion of coal is also acknowledged as a major source of air pollution leading to possible fatal effects. For South Africa in particular, one of the dangerous side effects of burning coal is acid rain, affecting stone, metal and brick elements. Highly acid rain, snow, hail or fog is produced when sulphur and nitrogen dioxides combine with the atmospheric moisture. “Coal in South Africa is rich in sulphur and the power stations in the Mpumalanga Province could be responsible for acid rain over other areas of our country”, explains the BCB.
Indeed, as announced by Greenpeace in August 2013, Witbank, a town outside of Johannesburg, has “some of the world’s most polluted air”. This can be linked with the activity of the 11 coal-fired power stations situated across Mpumalanga. Witbank is also the place where 83% of South Africa’s coal is mined.
Improving the National Ambient Air Quality
South African air is polluted by the high sulphur dioxide and particulate matter concentrations resulted from power-generation and industrial burning of coal. This urgent matter was addressed by the most recent air quality governance approach, the Air Quality Act of 2004 and the recent National Ambient Air Quality Standards 2010. Key directions of the new approach include: Decentralisation of air quality management responsibilities; Requirements that all significant sources be identified, quantified and addressed; Setting of ambient air quality targets as goals to achieve emission reductions. The National Standards sets limits for the following airborne particles: Sulphur dioxide (SO2), Nitrogen dioxide (NO2), Particulate matter (PM 10 – 10 micrometre diameter), Ozone (O3), Benzene (C6H6), Lead (Pb) and Carbon monoxide (CO). The required date of compliance with the standards depends on each element, from “immediate” (2010) to January 1st 2015.