To grow large quantities of algae requires a lot of water, nitrogen and phosphorus. This would mean that the fertilizers used to help grow massive amounts of algae would create more emissions than the algae would help eliminate. In addition, the use of algae would also ultimately lead to an increase in fuel prices. Fungi are another organism that offers a great opportunity to create a more efficient biofuel. I personally think this is an option that has not been fully utilized in the biofuel industry and is often overlooked. Mushrooms provide many enzymes that could be beneficial for a cheap and more efficient biofuel and could even be a fuel themselves. In fact, a tree fungus nicknamed Gilo naturally produces a mixture of chemicals quite similar to diesel, as it creates a range of long-chain hydrocarbon molecules almost identical to compounds found in fossil fuels. that it has the ability to transform lignocellulose from plants into sugars. This allows plant waste to be turned into useful fuels through a much simpler process and allows us to use the inedible parts of the plant, meaning it doesn't take anything away from the food.