 Susman examined the processes of abiotic and biotic degradation of plastics, and then looked specifically at degradation in air and degradation in seawater.He concluded, in a 15-page written opinion that
It is no longer tenable to conclude that there is 'no firm evidence either way' whether oxo-biodegradable is effective.I consider that recent research provides clear and compelling evidence that oxo-biodegradable plastic is indeed effective in facilitating very significantly speedier degradation than is the case when that technology is not used... [I] cannot imagine that such significantly speedier final degradation occurs later than 'within a reasonable time', however that the expression might be defined... [I regard the idea that biodegradable plastics might encourage littering as] "fanciful and unreasonable".