Ok, so you won’t actually be able to smell the fuel — for passengers, in fact, almost nothing will be different when a plane takes off from Los Angeles this summer fueled only by animal’s droppings and oils from animal fats.

It will be a big step, though, for the biofuels industry. The Times notes that companies that make alternative fuels have long seen airlines as potential partners, and this United (UAL) flight could be a sign of things to come.

For more on how the flight will work, and what it could mean for the industry, head to the Times.