Cities use a color-coded system for public waste containers.
See how it works in Barcelona—
check the full guide by the Barcelona City CouncilIf you're already separating carefully — great! Just continue as usual.
If you're new to this — no worries. You don’t need to be perfect — start simple.
Begin with just one category, like the yellow bin for plastics and metals — or any other — and you're already making an impact.