The carbon footprint of products vary because of a range of factors. This can be from different choice of materials in the product, different manufacturing routes & efficiencies and different logistics, amongst others. However, to provide a level of transparency we used data quality indicators to assess each piece of data collected. Data quality indicators are used in carbon footprinting to ensure that the accuracy of each datapoint is understood and transparent. These are available to view and allow you to see which items have good data quality and which items would benefit from better quality data.