The Dark Side of Sunscreen: Marine Pollution and the Urgent Need for Research
A new report underscores the alarming impact that sunscreens may be having on marine environments. Scientists are calling for urgent investigation into how chemical compounds in sunscreens are affecting marine ecosystems.
The Problem with Sunscreen Chemicals
Sunscreens often contain pseudo-persistent pollutants, substances designed to block UV rays. However, these chemicals can also harm marine life. Studies have shown that these compounds can cause coral bleaching and deformity, and reduce fish fertility.
The Scale of the Issue
As the global sunscreen market shows no signs of slowing down, with sales projected to reach $13.6 billion by 2028, the environmental impact is becoming increasingly significant. When sunscreen is applied and then washed off while swimming, large volumes of these potentially harmful chemicals enter the ocean. For instance, a single beach with 1,000 visitors could contribute up to 35 kg of sunscreen to the ocean if people assume a typical usage scenario.
The Scope of Sunscreen Pollution
A recent review published in the journal Marine Pollution Bulletin synthesizes findings from over 110 studies related to sunscreen and UV filters. It estimates that between 6,000 and 14,000 tonnes of UV filters are released annually into coral reef zones. This figure highlights the critical need for more extensive research into the ecological impacts of sunscreen pollution.
“Current research has only scratched the surface of understanding how these chemicals can affect marine life,” says Anneliese Hodge, the study’s lead author and PhD researcher at Plymouth Marine Laboratory and the University of Plymouth. “What’s particularly concerning is that these compounds are considered ‘pseudo persistent pollutants’ due to their continuous introduction into marine environments. We really need to understand how these chemicals interact in the marine environment and if they have the potential to bioaccumulate within the food chain.”
UV Filters, Global Reach, and Agricultural Impact
UV filters are found in marine environments worldwide, from tourist spots to remote areas like Antarctica. These compounds enter the ocean in various ways, whether through swimming or indirectly through beach showers or towels drenched in sunscreen. Benzophenone, one of the most common compounds in UV filters, has been identified as a persistent, bioaccumulative, and toxic substance. Benzophenone-3, frequently used in sunscreens and cosmetics, is now being investigated as a potential hormone disruptor by the European Chemicals Agency.
Moreover, UV filter pollution has spread beyond marine ecosystems. When recycled water from wastewater treatment plants is used in agriculture, these contaminants can affect crops and eventually reach aquatic environments through agricultural runoff.
The Ineffectiveness of Current Treatment Technologies
Traditional sewage and water treatment technologies like ozonation are proving ineffective in eliminating the toxicity of UV filters. According to the review, “There are increasing amounts and varieties of sunscreens entering the environment, and contaminants occur in all possible combinations,” says Prof Awadhesh Jha, a senior author of the review and professor in genetic toxicology and ecotoxicology at the University of Plymouth.
Recommended Actions
Researchers recommend more extensive research across different geographical regions and more diverse testing at various stages of marine life to better understand the problem of sunscreen pollution.
Conclusion
The environmental impact of sunscreen cannot be ignored. Urgent scientific investigation is needed to fully understand how these common products affect the marine ecosystem. By increasing our awareness and supporting research efforts, we can take steps to mitigate the damage and protect our oceans.
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