Hemp Sustainability and Life Cycle Assessment
category
Hemp is widely recognised as one of the most environmentally sustainable textile fibres: requiring no pesticides (natural pest resistance), 50–70% less water than cotton (300–500 mm rain-fed versus 1,000–2,000 mm irrigated cotton), sequestering 1.63 tonnes CO₂/tonne fibre during growth, and regenerating soil organic matter through root biomass (2–4 tonnes/ha root dry weight). Life cycle assessment (ISO 14040/14044) of hemp yarn shows global warming potential (GWP) of 0.5–1.5 kg CO₂e/kg fibre (cradle to farm gate) versus 5.5–8.0 kg CO₂e/kg for conventional cotton and 3.5–5.5 kg CO₂e/kg for polyester. Water footprint of hemp fibre is 2,400–3,400 L/kg (rain-fed, Netherlands) versus 10,000–20,000 L/kg for conventional cotton. Soil carbon sequestration in hemp rotations averages 0.4–1.2 tonnes CO₂e/ha/year. EU Industrial Hemp Regulation (EU 2021/2115) and USDA Farm Bill 2018 hemp legalisation have removed regulatory barriers to commercial production across major markets.
Role
Hemp's quantifiable environmental advantages over cotton and synthetic fibres in water, carbon, and land-use metrics provide scientific validation for sustainability claims supporting brand adoption, consumer preference, and policy incentives driving the hemp textile market's rapid growth.