Bioenergy crops can help fight climate change, but sustainable farming faces challenges. There's a debate over using land for food or bioenergy crops, and biomass for fertilizer or bioenergy. Sustainability standards focus on environmental and social factors, but overlook agronomic aspects like using biomass as fertilizer. This limits the potential for sustainable bioenergy, with biogas production being a more viable option. Expectations for bioenergy to meet global energy needs sustainably should be realistic.