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Milk may be contributing more to climate change compared to other beverages, according to an analysis which has pits impact on climate change against nutrient density, according to a report in Foodnavigator-USA.com.

The report quoting researchers in Food & Nutrition Research journal pointed out that animal-based food such as red meat and dairy products contribute more to Green House Gas emissions.

In what is billed as the first study to look at nutrient profile in relation to emissions throughout a product's lifecycle, the researchers used an index called the Nutrient Density to Climate Impact (NDCI) index. Nutrient density was worked out using the Nordic Nutrition Recommendations for 21 nutrients.

The NDCI was worked out for bottled carbonated water, soy drink, milk, soft drink, orange juice, beer, red wine, oat drink.

The carbonated water, soft drink and beer all scored zero due to their low nutritional value, while the red wine and the oat drink scored below 0.1.

Orange juice and soy drink scored 0.25 and 0.28 respectively.

The NDCI was the milk, however, was considerably higher, at 0.54.

Future discussions on how changes in food consumption patterns might help avert climate change need to take both GHG emission and nutrient density of foods and beverages into account, concluded the researchers in Food & Nutrition Research journal.

They recommended that the index be used to explore different dietary settings, and as nutrition and climate research advance more complete data will become available - and more sophisticated lifecycle analyses can be undertaken.

In particular, GHG emissions of fortified drinks will probably be available, enabling comparisons in the future between more nutrient dense beverages, they wrote.