I've just watched a couple of good auto racing documentaries. But it got me thinking that it's an emissions nightmare. Then I got to thinking about North American team sports where teams fly all the time, year round. It's really wasteful. Better division realignment based on geography would help, but only marginally. Hopefully teams can charter electric coaches in the future, but planes are a massive polluter.
I've also been thinking about the ethics of pet ownership in a climate breakdown era. Pet food alone requires an endless supply of beef, and it's problematic. I suppose you could add so many things to the list.