Hempcrete is part of a process that traps and removes carbon dioxide from Earth’s atmosphere. Hemp, like any plant, removes CO2 from the air to undergo photosynthesis. It retains the carbon from the molecule and releases the separated oxygen back into the air. Plants use the extracted carbon to produce sugar molecules and then store the excess sugar in their stems and roots. Using hemp as a material for production takes advantage of this naturally occurring process. Normally, plants die and release stored carbon back into the atmosphere when they decay. However, when used for a long-lasting building material, the carbon of the plant is trapped for longer than the plant’s natural lifespan admits. This means that the net removal of CO2 is higher for plant-based, long-lasting materials like Hempcrete.