Based on its persistence and high mobility due to lack of sorption , TFA's ultimate recipient is the Earth's hydrosphere. As TFA is omnipresent in all water bodies, from groundwater, oceanic water, ice cores, drinking water to bottled water , dilution in many ways has already occurred, with the only substantial remaining dilution medium being the deep ocean. Similarly, enrichment in plants will follow constantly increasing TFA concentrations, as water and soil concentrations increase. With limited processes for elimination from plant tissues because of TFA's persistence (no biotransformation) and its lack of volatility (as it is a strong acid in water and fully ionized), constant passive uptake from soil pore water via the transpiration stream can be expected for the lifetime of the plant as long as there is an input of TFA available. This theory is supported by findings for other short-and ultrashort-chain PFAAs and is in agreement with the results by Zhang et al. , who did not observe a steadystate concentration being reached for TFA in their wheat experiments.