According to the CHTA :
Hemp offers many different uses that can promote a more sustainable world. Hemp products can be recycled, reused and are 100% biodegradable. Proponents of hemp claim that it can help reduce global warming because it takes out large amounts of carbon dioxide per acre, more than most plants. This is especially true if the end products are locked up permanently in applications like building materials as opposed to recycling the carbon by applications such as compost.
The utilization of hemp in biofibre processing has significant environmental benefits. Bio-products made of hemp can produce environmentally friendly products that are easily recycled in compost or in landfills. Most hemp-derived products are non-toxic, biodegradable and renewable.
Carbon Sequestration: High biomass crops such as industrial hemp are associated with the ability to sequester higher amounts of carbon through photosynthesis, storing it in the body of the plant and its roots. The carbon in the fibre is then transferred into processed biofibre products. Biomass is approximately 40% carbon. Processing of the fibre will sequester carbon that will be captured and tied up in manufactured products.