It’s hard to know which choices—in the supermarket or elsewhere—can best protect the planet. Here’s a quiz to clear up some of the confusion. (Some answers sure surprised us!) Each question has only one correct answer. Good luck!

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This quiz comes from Nutrition Action. We don't accept any paid advertising or corporate or government donations. Any products we recommend have been vetted by our staff and are not advertisements by the manufacturers.

Photos: Alex Desanshe, Liliya Trott -