Dear Dr. Potočnik,

I came through the circularity gap report 2020 you co-authored, because the German Society for Tribology ( ) is elaborating the second study “Sustainability&Wear Protection” due for fall 2020.

The “circularity” seems to be higher than 8,6%, when using the 92,1 gigatons of consumed ressources. It is stated in the report, that “A proportion of these billions of tonnes extracted comprises inherently non-circular and non-regenerative materials“, or 15,062 gigatons of fossile energy sources. Second, the biomasses of 24,062 gigatons can only be in part used in for a second life. Both figures were taken from U.N. Global Ressource Outlook 2019.
Doing so, the global circularity is >11%.

I think, that the annual pool of consumed resources susceptible for improvement in longevity through tribological measures accounts to 61,4 Gigatons of material minus materials for constructions. In consequence, wear protection and/or condition monitoring can contribute some “Wedges” to reduce CO2 emissions. Same approach for corrosion protection.

The GfT study 2019 “CO2&Friction” may attract your attention:

Best wishes
Dr. M. Woydt
MATRILUB Materials Ι Tribology Ι Lubrication
D-12203 Berlin-Dahlem (Germany)