Or search by topic
This problem is based on the work done by Sarah Bridle and her colleagues at "Take a Bite out of Climate Change".
There are opportunities here to discuss compound measures, and what might be a good measure of the "best food". Students can also be asked to consider what other information might be useful.
On this page there are some suggestions about how the complete set of Climate Food Flashcards can be used in the classroom. You can download a set with front and back sides via dropbox, or there is a pdf version with 8 cards per page.
You can find more information about over 100 different types of food in this spreadsheet, whcih might be useful for futher investigations.
This problem is one of a collection designed to develop students' carbon numeracy; we hope it will encourage students to think about the issues surrounding climate change. You can find the complete collection here.