White eggs have a smaller carbon footprint than brown ones, research suggests Get the free Morning Headlines email for news from our reporters across the world Sign up to our free Morning Headlines email Sign up to our free Morning Headlines email Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice Sainsbury’s will ditch brown eggs and stock only white eggs in its latest move towards net zero , the retailer has confirmed. The