"In order for #PVA to #biodegrade, special PVA-adapted microbes need to be added at high levels and for long durations. Currently, most water treatment facilities do not sufficiently treat PVA in water, and therefore poses a series of environmental and safety concerns. "
Also:
"the production of PVA film involves heavy environmental and safety burdens in carcinogenic toxins, ozone depletion, acidification, eutrophication, and fossil fuel depletion."