Klimatpåverkan av hampadryck ur ett livscykelperspektiv
Sammanfattning: Hemp milk has the potential to be a climate-friendly substitute for cow milk. In contrast to other milk substitutes, the climate impact of hemp milk has not yet been studied. This study aims to examine the climate impact and water consumption of hemp milk throughout the whole process from the agricultural stage to the finished product via a life cycle assessment. The results show that the climate impact of one liter of hemp milk generates between 110 g - 160 g CO2-eq depending on the allocation of emissions from agriculture and source of energy used in the factory. The largest climate impact in the life cycle came from packaging and its combustion. The water consumption of one liter of hemp milk was calculated to 1.3 liter. The calculations were performed using information from the literature in combination with data from interviews with hemp farmers, among others. Both the climate impact and water consumption was generally lower than other plant-based alternatives found in the literature. This is likely due to differences in the system boundaries. If the boundaries would be the same, chances are that the climate impact from hemp milk still would be lower than the compared substitutes. This is due to less need of chemicals in the agriculture step and other deviations in the processing. The results would be lower if carbon dioxide storage was included in the analysis. If hemp milk were to be put on the market, it would open up for consumers to make an informative choice of a more climate smart milk substitute.
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