LEGO has recently announced a revised plan to achieve sustainability goals. Previously, they had declared in 2021 that they would switch from using acrylonitrile butadiene styrene (ABS) plastic to polyethylene terephthalate (PET) derived from recycled plastic bottles. However, it was discovered that this new process consumed more energy, resulting in no reduction in carbon emissions.
Despite the setback with PET, LEGO has confirmed their commitment to finding a more sustainable alternative and reducing carbon emissions by 37% by 2032, which is 8 years from now. They are currently conducting various tests on different materials.
TLDR: LEGO is changing its sustainability plan after realizing that their initial switch to PET from ABS plastic did not help reduce carbon emissions. They remain determined to find a more sustainable option and aim to decrease carbon emissions by 37% within the next 8 years. They are currently conducting tests on alternative materials.