Are you referring to the man's travels, or his companies? Every time his company testfires rocket engines, or sends a rocket to space, it's burning a lot of exotic and not-so-exotic chemicals like rubber and aluminum. Can't be good for the environment. But liberals always get a pass, polluting on a massive scale equivalent to thousands of ordinary folks minute carbon footprints.
Musk’s rockets burn kerosene and liquid oxygen for now. Will switch to liquefied natural gas and oxygen later.
Burt Rutan’s rocketry burns synthetic rubber and nitrous oxide.
Space shuttle’s side boosters burned aluminum and a perchlorate oxidizer. Shuttle’s mains burned liquid hydrogen and Lox.