Spray cans no longer contain ozone depleting products.
The aluminium is 100% recyclable but must be disposed of properly in the appropriate bins (“ecological islands”). It must be completely drained and the plastic parts such as the cap and spraying cap must be removed.
There are also water-based sprays that have the particularity of being odourless, extremely opaque and removable before drying : characteristics that make them also suitable for educational use in schools.
Did you know that there are special anti-smog paints ? One of the largest anti-smog murals in Europe is located in Rome, it was created in 2018 and is called “Hunting Pollution”.