Plant-based biomass refers to organic materials derived from plants that can be used as a source of energy. This includes materials like wood, crop residues, and dedicated energy crops. When these materials are burned or converted into biofuels, they release energy that can be harnessed for heating, electricity, or transportation. The use of plant-based biomass is considered renewable because plants can be regrown over time. Additionally, it can help reduce greenhouse gas emissions compared to fossil fuels, as the carbon dioxide released during energy production is offset by the carbon dioxide absorbed by plants during their growth.