The diagram illustrates the continuous process of a biofuel called ethanol, demonstrating how ethanol is produced through different stages, including energy extraction, harvesting and pre-processing.
Overall, the biofuel production process is cyclical in nature, involving the transformation of raw materials like plants and trees into cellulose, thereafter into sugars before subsequently into ethanol, which produces gas emissions(carbon dioxide) afterwards.
The process begins with plants and trees receiving the energy provided by sunlight and carbon dioxide to grow. Following this growth phase, plants and trees are harvested. Subsequently, raw materials undergo pre-processing altering them into a compound called cellulose. In this stage, cellulose is extracted and converted into a more complex compound called sugar.
In the latter part of the process, microbes are introduced into sugar before eventually altering it into the production of ethanol. Ethanol is able to be used for transportation usage such as cars, trucks and aircraft, emitting carbon dioxide, repeating the cyclical process.