Here’s a fascinating podcast about how signs and language, amongst other norms, can affect individual behaviours.
It’s called “The Role of Social Norms in Energy and Water Conservation”.
If you are interested in how consumers can be led or ‘nudged‘ on sustainability, it might be of interest.
Likewise, the speech given on this podcast, from the Stanford Social Innovation Conversations website, is probably also useful for internal communications on sustainability too.
Well worth a listen.