At the outset it should be stressed that the published data available for GHGE for food and drinks is very limited and the values are only approximate. Values can vary between different sources of data, with inconsistencies partly explained by differences in the assumptions made in the calculations and methodologies used to estimate GHGEs. While this makes it difficult to combine datasets, the general hierarchy of GHGEs from different food groups is reasonably consistent. Unlike the national food and nutrient composition databases, which contain nutrient information for an extensive range of food and drinks, there is no equivalent database for.
