[kube-system]

CO2 is only one measure of environmental impact. Pollution is a very big problem for disposable beverage containers, and the good thing about aluminum is that it is highly recyclable and also has a significant enough scrap value that it incentivizes collecting the waste instead of discharging it into the environment.

This is (unsurprisingly!) also in that source:

> Aluminum cans have relatively high MCI scores of ~0.7, which reflects the highest average recycled content (55% of can stock, 3% of end and tab stock) and end of life recycling rate (69%) of all beverage packaging materials.

[yayamo]

very good point, I do think in general plastic packaging should be avoided as much as possible exactly for that reason.