Marcus is a residential life warden at a university hall of residence. The undergraduate students living there are typically first-years aged between 18 and 20. Marcus is tasked with increasing recycling rates (specifically sorting paper, glass, and food waste correctly) and reducing communal food waste in the shared kitchens.
What suggestions might an environmental psychologist make to Marcus about cognitive and behavioral techniques for improving recycling behaviors and reducing food waste among the students in the halls?