Hi @emimoron, no doubt the damage caused by the use of this compound in gasoline is still perceived and will be felt for a long time, and certainly the big industries had much to do in this, although it was already known that some alcohols could be used for this purpose were not considered because they were more expensive and could not be patented. Some time ago I wrote about the carbon footprint of spacecraft, maybe I will go deeper into the type of fuel.