You don't have to trace shit to know fast food, fast fashion, and cruise lines are unsustainable. It is obvious we are producing more emissions when we fly for vacation, buy huge trucks and SUVs we don't need.
Much of what we need to do is both obvious and easy because it merely involves us NOT buying things.
And most of the worst stuff like fast food, fast fashion, huge vehicles, and excessive meat consumption don't do anything to sustain a higher quality of life. Many of them reduce it.