The different 9% comes from food thrown away by retailers and shoppers. Much of this skew, as we’ve already mentioned, comes from the variations between plant-based sources and meats similar to beef and lamb. But so much comes from the massive variations in footprint for specific products. They estimated that if the typical family substituted their calories from red meat and dairy to chicken, fish or eggs just in the future per week they might save zero.three tCO2eq. If they changed it with plant-based alternatives they might save zero.forty six tCO2eq.