The selection of sustainable biomass feedstocks for bioenergy is critical for ensuring long-term fuel production without environmental degradation. Non-food crops, agricultural residues, and algae are increasingly being explored as viable alternatives to traditional energy crops. Advanced breeding and genetic engineering are optimizing feedstock yield, drought tolerance, and carbon sequestration capabilities. Integrated land-use planning and agroforestry practices are further enhancing biomass sustainability. As bioenergy demand rises, securing responsible feedstock sourcing is essential for achieving carbon-neutral energy goals.