Scientists in Ghana are raising alarms about a silent threat, radon gas, which may be contributing to lung cancer cases in areas like Weija, Kasoa, and McCarthy Hill, beyond well-known pollutants such as smoke and dust. Researchers from the Ghana Atomic Energy Commission (GAEC) have identified a correlation between high radon concentrations and areas prone to seismic activity, suggesting a geological link to this invisible radioactive gas.
Understanding the Invisible Threat
While air pollution is commonly associated with visible sources like vehicle exhaust, industrial emissions, and waste burning, radon presents a more insidious risk. This naturally occurring radioactive gas emanates from the ground and can seep into homes through foundation cracks, gaps, and poorly ventilated spaces.
Dr. Irene Opoku-Ntim, a Senior Research Scientist at GAEC, highlighted the hidden nature of this danger. “There are other pollutants, as we all know, that we talk about, the dust, the burning and all those things, but there’s also another hidden risk that is radon, which is giving people lung cancer beyond smoking and the other pollutants that we know out there,” she stated.
Geological Links and High-Risk Zones
Preliminary research by GAEC has led to the development of a radon map for Ghana. This map indicates that areas with high radon concentrations often coincide with regions experiencing seismic activity, suggesting that geological fault lines play a significant role in radon’s presence. Specific areas identified include Weija, Kasoa, and McCarthy Hill, situated along these fault lines.
“So we have a radon map for Ghana, which is a preliminary one that we’ve done. We are still working on that. That shows that places that have high radon concentration is being correlated with places that have earthquakes,” explained Dr. Opoku-Ntim. “So we’ve done a bit of research in the high radon areas, that is, Weija, Kasoa, McCarthy Hill, along those stretches. So we have the fault lines that pass through. So within these fault lines, radon in those areas is high because radon is being correlated with earthquakes.”
Health Risks and WHO Guidelines
The World Health Organization (WHO) identifies indoor radon levels above 100 becquerels per cubic metre (Bq/m³) as a health risk that warrants mitigation efforts. Prolonged exposure to radon can damage lung tissue and significantly increase the risk of developing lung cancer, even in individuals who have never smoked.
When radon enters a building and becomes trapped indoors, occupants can inhale it over extended periods without realizing the danger. This silent accumulation of radiation exposure is a primary concern for public health officials.
Mitigation Strategies and Protective Measures
Fortunately, scientists emphasize that steps can be taken to reduce radon exposure and its associated risks. Awareness and testing are crucial first steps in identifying potential problems within homes and buildings.
“If you test the soil and the levels are high, we will advise you on how to build,” Dr. Opoku-Ntim advised. “We see that nowadays, we build by casting our foundation, laying this polyethene. It’s one of the ways to reduce the impact.” Proper construction techniques, such as using impermeable barriers like polyethylene sheeting beneath foundations, can help prevent radon from entering structures.
Furthermore, maintaining good ventilation and sealing any cracks or openings in the building’s foundation and walls are essential. “Any space that it gets, it can enter your room. So if you have cracks in your homes, make sure that you seal them,” she urged.
Implications and Future Outlook
The findings underscore the need for increased public awareness regarding radon as a significant indoor air pollutant and lung cancer risk factor in Ghana. As research continues to map radon levels across the country, homeowners and builders in identified high-risk zones should consider testing their properties and implementing protective measures.
The collaboration between GAEC and New Narratives, supported by the Clean Air Fund, highlights a growing focus on comprehensive air quality assessment. Future efforts will likely involve broader testing initiatives, public education campaigns, and the integration of radon mitigation strategies into building codes and public health policies. The public should remain vigilant and informed about potential indoor air quality hazards beyond the commonly recognized pollutants.
Leave a Reply