One among the key ingredients in the development of every nation's economy is energy. For emerging nations, economic expansion is desirable, and energy is necessary for economic progress. Most important world economies, and also big consumers of fuels from fossils, have been obliged in order to look into renewable as well as less expensive energy sources to suit their needs due to the rise in the expense of fuels from fossils on a global scale. The relevance of biofuels (biodiesel and ethanol) is developing quickly along with rising concern over the supply of crude oil and rapid climatic changes. A safe and healthy fuel is biodiesel. Biodiesel is a fuel which is procured from plants or animal fats that are both edible and inedible. It doesn't need to be modified for usage in our diesel engines currently. It can be combined with the remaining diesel and petroleum. Biodiesel is interesting since it reduces greenhouse gases by 78%. Due to their quality ingredients matching diesel and gasoline, respectively, bio-ethanol as well as diesel has appeared to be the upmost viable renewable fuel and serve as substitute to fossil fuel. They also produce less pollution than their rivals who use fossil fuels. Worldwide efforts to produce ethanol derived from sources such as plants that produce sugars and starch and biodiesel from vegetable oils have increased because to concerns with the environment and We must cease consuming petroleum if we want to stay alive on this earth, as it is heating up. People are testing out different ways to halt global warming around the world to see which ones are most effective. Nearly all countries favor biodiesel as their fuel of choice.