Several downfalls exist with both the traditional production
route as well as the “green” route. First, all processes still rely
on petrochemicals [11,32,34]. Second, while hydrogen peroxide,
ozone and UV light are generally safe (fewer hazards associated
with production), the prepration process of the starting materials
in all three processes are more harmful than the production of
adipic acid from the starting material, hence the green routes lead
to limited improvements on the environment.