September 10, 2018
Source: European Commission Joint Research Centre
Summary: Shifting to a healthy diet is not only good for us, but it also saves a lot of fresh water, according to a new study. Compared to existing diets, the water required to produce our food could be reduced by up to 55 percent for healthy pescetarian and vegetarian diets.Shifting to a healthy diet is not only good for us, but it also saves a lot of precious fresh water, according to a new study by the JRC published in Nature Sustainability.
Compared to existing diets, the water required to produce our food could be reduced by between 11% and 35% for healthy diets containing meat, 33% and 55% for healthy pescetarian diets and 35% and 55% for healthy vegetarian diets.
Researchers compared these three diet patterns, defined by respective national dietary guidelines, to the current actual food consumption, using available data from more than 43 thousand areas in France, the UK and Germany.
They found that eating more healthily could substantially reduce the water footprint of people’s diets, consistent across all the geographical entities analysed in the study.
The study is the most detailed nationwide food consumption-related water footprint ever made, taking into account socio-economic factors of food consumption, for existing and recommended diets.
Influences on the food we eat
The scientists also show how individual food consumption behaviour — and their related water footprints — depend strongly on the socio-economic factors like age, gender and education level.
They found interesting correlations between such factors and both the water footprint of specific foods and their resulting impact on overall water footprints.
For example, the study shows how in France, the water footprint of milk consumption decreases with age across the municipalities analysed.
Across London, they show a strong correlation between the water footprint of wine consumption and the percentage of the population of each area with a high education level.