Researchers have raised concerns about a novel type of acid rain that is becoming increasingly prevalent, complicating efforts to mitigate its impact; I did it poses a hazard to all forms of life on Earth.
Trifluoroacetic acid (TFA) — a type of persistent “forever chemical” — is now found in rain and snow globally, in concentrations significantly higher than in past decades.
While the exact implications of TFA for human health and the environment remain unclear, some scientists are suggesting that these chemicals I did it may present an existential risk.
“Recent findings indicate that TFA can interfere with critical Earth system processes, such as mammalian embryo development and diminished soil respiration,” stated Professor Hans Peter Alp, a chemist at the Norwegian University of Science and Technology, in BBC Science Focus.
Professor Alp’s latest research categorized TFA as a planetary threat comparable to global warming and ozone depletion.
“We are uncertain about the long-term consequences,” he continued. “Due to the global accumulation of TFA, any long-term effects may manifest on a worldwide scale.”
“Moreover, when TFA impacts the environment, it does not break down naturally, making intervention too late. Existing technologies for TFA removal are prohibitively expensive and only applicable in limited scenarios.”
The ARP paper emphasized the necessity of taking proactive measures to curb the rapid buildup of TFA before it is officially deemed an emergency threat.
“In the heating and cooling sectors, this means we must avoid gases that lead to TFA formation,” Alp added.
“Another necessary step is to phase out pesticides and pharmaceuticals that produce TFA during degradation.”
Some nations have already begun taking action. Denmark is leading the charge, having banned 23 pesticide products in July 2025 due to their association with TFA contamination.
TFA belongs to a category of “Forever Chemicals,” more formally known as polyfluoroalkyl substances (PFAs), which are notably resistant to degradation.
Among these persistent chemicals, TFA is one of the smallest. It can infiltrate the environment from sources such as refrigerants, aerosols, pesticides, air conditioning units, landfills, and sewage systems. When larger PFAs degrade, they often convert into TFA.
Because of its small size, TFA readily dissolves in water. This property contributes to its prevalence as a persistent chemical, as it is rapidly increasing not only in rain but also in rivers, lakes, groundwater, oceans, vegetation, food, and urine.
The ARP indicated that finding TFA in “previously untouched water resources” could be alarming. This is particularly troubling as TFA is considered nearly impossible to remove from drinking water.
Some scientists suggest that TFA may not pose significant risks to humans because it does not linger or accumulate in our bodies but is quickly excreted through urine.
However, the ARP maintains that new evidence shows an increasing presence of TFA in humans, animals, and ecosystems.
“We observe that TFA can penetrate cells, becoming integral components of lipids, proteins, and cellular structures. This may explain noticed alterations in microbial activity within soil,” stated ARP.
Researchers, including Alp, are exploring methods to eliminate TFA from the environment, such as cultivating crops that can absorb TFA.
Nonetheless, Alp emphasizes that further research is essential to assess the true level of threat posed by TFA. In the meantime, he urges that “the foremost priority is to curtail emissions before irreversible global consequences unfold.”
Read more:
About our experts
Professor Hans Peter Alp is a chemist at the Norwegian Geotechnical Institute and a professor at the Norwegian University of Science and Technology. His research focuses on how pollutants behave in environments that include microplastics, everlasting chemicals, metals, and more.
Source: www.sciencefocus.com
