Retailer Sainsbury’s has pledged to stop selling brown eggs under their own brand as part of their sustainability program, moving to white-shelled versions instead.
The second-largest UK supermarket chain cited animal welfare and carbon emissions when announcing the decision.
But why don’t white and brown eggs have the same environmental impact, and why are eggshells different colours to begin with?
Why are brown eggs worse for the environment?
An assessment by SAC Consulting for Sainsbury’s found that brown eggs have a 12.7% higher carbon footprint than white eggs, as the hens that produce brown eggs are larger and eat more food.
Sainsbury’s said the change would therefore “indirectly reduce demand on land and water used to grow feed crops, as well as the amount of manure produced” by the chickens.
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