Scientists calculate carbon footprint of the food we eat. Fruits, grains, and vegetables had the smallest carbon footprints, followed by nuts and beans. Among animal proteins, chicken, pork, and fish offer the greenest options, while lamb and beef are the least eco-friendly.

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Scientists calculate carbon footprint of the food we eat. Fruits, grains, and vegetables had the smallest carbon footprints, followed by nuts and beans. Among animal proteins, chicken, pork, and fish offer the greenest options, while lamb and beef are the least eco-friendly.