The goal is to find better ways to make eco-friendly biofuels from plant leftovers. Scientists focus on using tough plant parts, like stalks, for making 2nd generation biofuels like bioethanol. They have come up with steps like treating the plant parts, breaking down sugars, and fermenting them to make biofuels. These methods help to make the most of the plant scraps available to create fuels like bioethanol, biodiesel, and biogas.