Recycling and waste management are complicated. So make the communication as simple and straightforward as possible.

Communication (signage) is done via colours, words, and symbols.

Make sure that the signage for waste generation is consistent throughout your facility (and ideally consistent with common practices in Singapore).

Report to your staff the waste management performances and highlight the environmental benefits from it. For instance: "10 tonnes of cardboard was recycled: we together saved 240 trees".