Do you have any references for this? I couldn't find any mention of this in my research. For example it's not mentioned here: https://en.wikipedia.org/wiki/En

Do you have any references for this? I couldn't find any mention of this in my research. For example it's not mentioned here: https://en.wikipedia.org/wiki/Environmental_impact_of_aviation#Scope_for_improvement https://en.wikipedia.org/wiki/Environmental_impact_of_aviati...