This report highlights the importance of bioenergy with carbon capture and storage (BECCS) as a negative emissions technology to meet global warming targets. BECCS involves the wide-scale deployment of carbon capture and storage (CCS) to produce energy from biomass and store the resulting CO2. While historically deployment has been slow, major BECCS technologies are mature and have substantial potential. However, the availability of land, water, and fertilizer to supply biomass is a major constraint on BECCS deployment. Most climate change scenarios use negative emissions technologies to draw CO2 from the atmosphere, and of these, BECCS is the best option. To meet global warming targets set for the end of the century, BECCS deployment will need to reach gigatonnes of CO2 stored per year.