My friend Suze is waging a one-woman crusade at her university campus; she is encouraging her colleagues to use use the 'real' plates and cutlery provided by their on-site canteen, rather than the disposable alternatives that are also available (for takeaway back to their desk). This may sound like an easy ask (and Suze is a very persuasive person) but she has been met with reluctance because people would have to...wait for it...walk their dirty crockery back to the canteen for the kitchen staff to place in the dishwasher! Imagine!