Arizona State University (ASU) CEE181 Technological, Social, and Sustainable Systems Final Practice Exam

When evaluating the burning of biofuels to reduce atmospheric carbon, it is crucial to consider the energy-intensive use of fertilizers in the production of these fuels. The cultivation of biofuel crops often requires significant amounts of fertilizers to maximize yield. This need for fertilizers can lead to a higher net energy consumption when considering the total lifecycle of biofuel production.

Using energy-intensive fertilizers not only consumes energy resources but can also contribute to carbon emissions through the production and transportation of these fertilizers, counteracting some of the carbon reduction benefits of burning biofuels. Additionally, the methods of fertilizer application can lead to environmental issues such as soil degradation and water pollution, which further complicates the sustainability of biofuels as a solution to atmospheric carbon reduction.

By focusing on the energy-intensive aspect of fertilizer use, we can better understand the overall impact of biofuels on carbon emissions and resource sustainability, clarifying that this consideration is significant in assessing the effectiveness of biofuels in mitigating climate change.