This is very similar to how the electrical energy market promotes sustainable energy in Europe: Certificates for sustainable generation of energy are traded alongside the actual energy (e.g. wind or solar certificates). Utilities / companies and by extension households can then buy the certificates alongside the energy to fulfil individual sustainability demands.
That concept is successful to a large extend, there is high demand for certain kinds of certificates and a sizeable market has formed around it.
This is very similar to how the electrical energy market promotes sustainable energy in Europe: Certificates for sustainable generation of energy are traded alongside the actual energy (e.g. wind or solar certificates). Utilities / companies and by extension households can then buy the certificates alongside the energy to fulfil individual sustainability demands.
That concept is successful to a large extend, there is high demand for certain kinds of certificates and a sizeable market has formed around it.