Those things aren't new, but the scale of it is new. In particular, passenger air travel has absolutely exploded the last couple of decades. According to this [

Those things aren't new, but the scale of it is new. In particular, passenger air travel has absolutely exploded the last couple of decades. According to this [1] chart, the number of passengers have doubled in 2006. It's up by a factor 13 since 1970. Our systemic environmental problems don't mostly come from new concepts, but from population growth and globalization. [1] https://data.worldbank.org/indicator/IS.AIR.PSGR https://data.worldbank.org/indicator/IS.AIR.PSGR