Aquatic systems, factors affecting toxicity

The occurrence of phototoxicity in PAH-contaminated sites is nearly impossible to observe. Most highly contaminated sites are biologically depauperate, making direct observation of the toxic processes for species that would normally reside there untenable. Hence, although the potential for phototoxicity, its mechanisms and key components, has been thoroughly demonstrated, its importance in potentially affected aquatic systems has yet to be fully characterized or quantified. Thus, there is a definite need to continue studying the phenomenon due to the following factors ... 

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