This report covers a preliminary life cycle assessment (LCA) on imitation leather made from hemp fiber (hemp leather) and a comparison to bovine leather, to examine whether hemp leather is an environmentally sustainable alternative. The bovine leather industry is responsible for heavy chemical use and emissions, detrimental effects to the environment as well as to human health. The United Nations (UN) and other organizations call for immediate action against the animal product industry sector to greatly reduce emissions and protect the environment. Hemp is a versatile plant that can be used for many things, including paper, composites, textiles, food and medicine, and is probably a suitable material for imitation leather. The hemp plant requires little inputs, grows fast and without pesticides, has positive effects on the environment and can be cultivated on every inhabited continent. The preliminary LCA was based on a patent describing the manufacturing process of hemp leather completed with data from literature and a few assumptions made. LCA- results for bovine leather were collected from literature and the two leather fabrics were then compared. The comparison showed that hemp leather is superior to bovine leather in all compared categories except for water consumption and hazardous waste. Bovine leather had 99% more energy use, 78% higher acidification potential (AP), 99,9% higher eutrophication potential (EP) and 83% higher global warming potential (GWP) than hemp leather. The large water consumption in the manufacturing phase of hemp leather is possible to be explained by over dimensioning of inputs. The report concludes that hemp leather would be the environmentally and ethically admirable choice between the two leathers and that more research on more modern methods of manufacturing it should be performed.

Source 1

In recent years, there has been a growing interest in the leather industry towards sustainable and innovative alternatives to traditional leather production methods. Alongside this trend, efforts have been made to reduce environmental damage by focusing on natural tanning methods in the production of natural leather, thus adopting more sustainable production techniques. Alternative materials such as apple leather, pineapple leather, banana leather, cactus leather, bacterial cellulose leather and cork leather have emerged as viable options in response to this shift. Additionally, there has been notable development in exotic leather alternatives, with materials like crocodile, puffer fish, and ostrich leather taking the forefront. These exotic leather options not only offer alternatives but also aim to fulfill specific purposes such as habitat conservation, particularly evident in the case of puffer fish leather production. The aim is not only to provide alternative materials but also to ensure environmental sustainability and ethical practices throughout the production process. This article delves into the description of alternative leather options while also providing an analysis of the life cycle of leather. It aims to underscore the importance of discovering innovative and sustainable leather alternatives in reducing the environmental footprint of the leather industry. By considering various materials and utilizing tools such as Life Cycle Assessment (LCA), stakeholders can work towards a more sustainable and ethical future for leather production.

Source 2

The global leather industry has been at the receiving end of various environmental and ethical backlash as it mainly relies on animal agriculture which contributes to deforestation, greenhouse gas emissions, and animal welfare concerns. In addition, the processing of animal hides into leather generates a huge amount of toxic chemicals, which ultimately get released into the environment. Thus, growing concern for environmental sustainability has led to the exploration of alternative materials to conventional animal-based leather. In this regard, the application of fungal leather alternatives in material technology is gaining traction because of its high biodegradability, biocompatibility, renewability, as well as its affordable and carbon-neutral growth processes. Fungal leather alternatives have been found to possess significant mechanical and physical properties, thanks to the interwoven hyphal network of the fungal mycelium, as well as antimicrobial activities which have been ascribed to their bioactive metabolites. Various fungal species, including those from the Agaricus, Fomes, Ganoderma, Phellinus, and Pleutorus genera, are currently being investigated for their potential in this area. This review, therefore, attempts to gain insights into the recent advances in scientific research and real-world applications of fungal-derived leather like materials. It makes a compelling case for this sustainable alternative and discusses the morphology-property relationship of the fungal mycelium driving this innovation. Additionally, the current processing methods and major players in the fungal leather substitute industry are presented. The paper also brings attention to the challenges facing the full deployment of fungal leather substitutes and proposes solutions with the aim of encouraging further research and resource mobilization for the acceptance of this renewable leather substitute.

Source 3

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