LEGO has used and uses may different kinds of plastic not only ABS. From my understanding the effort here was halted because the whole reason to use PET was to

LEGO has used and uses may different kinds of plastic not only ABS. From my understanding the effort here was halted because the whole reason to use PET was to be greener but if manufacturing with PET burns more CO2 than other non renewables it makes no sense at this time.