Depending on what is available in your area, you might try to visit a place that makes biodiesel. It would be helpful to see the process first hand. In my area, there are many people who create their own biodiesel. Of course, right now they generally take used cooking oil to create biodiesel. While this isn't the same as creating fuel by enzymes, it is a great place to start. It might be interesting to see what leaps in technology are needed to make enzyme generated fuels possible. We can generate fuel from algae with the technology we have now; however, it is not cost effective nor is it a simple process. There is currently a lot of research into different types of biofuel. It may help to understand the differences in the various fuels and the processes used to create them.
Another topic could be the use of various plants to make ethanol. Right now this, is being done in the United States using corn and in Brazil using sugar cane. However, the optimal thing would be to discover ways to use non-food plants to make fuel. This would allow for carbon dioxide reduction without having impacts on the supply and price of food.