The power of the nudge can promote healthier and more sustainable food choices

This 2019 study conducted in Denmark demonstrates the powerful impact of changing the default lunch option. Simply changing from a non-vegetarian default option to a vegetarian default option greatly increased the percentage of conference attendees who selected vegetarian meals in all 3 lunch conferences.

https://academic.oup.com/jpubhealth/advance-article/doi/10.1093/pubmed/fdz154/5637580