Goal 12: Responsible Consumption and Production

https://www.un.org/sustainabledevelopment/sustainable-development-goals/

Cardbord
Magnet
Steal can
Aluminium can
Tape

Steal can react magnet.
But Aluminium can doesn't react magnet.
so steal can go to some where else!

Machine actually sorting. But magnet is too hard so steal can stick magnet.

I want to make steal can doesn't stick.
And Sort.