[Shaanie]

There's no single thing you can point to as "the issue" (unless you just point to fossil fuels in general, I guess). Driving a couple of thousand miles per year as a hobby is pretty bad, that's quite a lot of "unnecessary" co2 emissions. Will it cause mass starvation and make environments uninhabitable? No, not by itself, but it'll contribute more than most hobbies. I believe it's in the same ballpark as a round-trip flight across the Atlantic, for reference.