The article discusses how bio-jet fuel can help reduce greenhouse gas emissions from traditional jet fuel. Different methods like alcohol-to-jet and oil-to-jet are used to produce bio-jet fuel. The most popular method is hydrogenated esters and fatty acids. Second-generation biofuels are environmentally friendly and technologically advanced. Jatropha is a crop that produces a lot of energy. The main obstacles to using bio-jet fuel are the price of feedstock and its availability. Further research on optimal feedstocks is needed to improve energy quality. Biomass jet fuel has the potential to replace conventional jet fuel for both commercial and military aircraft. High yield feedstock is important without affecting food production.