Literature review on latest and different applications of lignin in comparison with fossil fuel. The objective of the study focus on applications of lignin with different catalyst involved in the conversion of lignin to useful products in comparison with fossil fuel. The literature review should be based on the latest research from 2017 to 2021 and should include tables/graphs/pie charts/figures explaining the comparison with fossil fuels. The review gives an idea about the applications of lignin focuses on catalytic conversion ( lignin to useful products with help of different catalysts) in comparison with fossil fuels. Please avoid Medical Applications of Lignin