I wasn’t able to find a definitive answer to your question. Lego blocks are usually made of ABS plastic, not PET, so I though initially the company was doing a thermal breakdown to the hydrocarbon level, then reformulating it into ABS, which I could absolutely be a CO2/energy intensive process.
However this Lego company linked PDF suggests they’re actually making blocks out of PET and not reformulating. This should be a significantly less CO2/energy intensive.
One other thing to consider is how Europeans are approaching “green” initiatives. European methods are generally hyperfocused on CO2 reduction as pollution largely ignoring other types of pollution. As an example, with automobile pollution diesel cars were incentives because they produced less CO2 than gasoline cars for similar distance/work. This ignored the NOX and particulate pollution from diesel which was far worse than gasoline. The statement Lego made here of "didn’t reduce carbon emissions” resonates with that idea.
Back to Lego, even if PET method was only CO2 neutral, using recycled PET could still be a good path to reduce PET plastic from going into landfills or being burned (producing other toxic pollution). However, if CO2 reduction is the only goal, then the program ending isn’t surprising.
Schneemensch@programming.dev 1 year ago
They stated that the new mater lies would not live up to their requirements on longlivity and quality. Abs which is currently used is quite stable and can and is therefore be used for generations.
The new materials would lead to faded and broken Lego bits after some years and degrade the brand perception. Since new stuff would need to be bought then this would be less CO2 efficient.
For other PET products we usually do not have any longlivity requirements. Plastic bottles barely need to survive for a year and therefore the recycling process is still much better than producing new plastic.
In short: It is better to produce 1kg of CO2 once every 30 years than 0.2kg of CO2 every 5 years.
I am sure there is still some typical greenwashing in the calculations, but it makes sense to me that they do not want to reduce their quality standards.
xthexder@l.sw0.com 1 year ago
The article says the recycled plastic was able to meet their quality requirements, just not with any reduction in emissions. They’ve also tried many potential materials that didn’t meet their requirements, and presumably some of the other options could have reduced emissions at the expense of quality.