[azan_]

> I think a broad tax would just make it more difficult for middle and lower class to fly. Tax the business/first class and frequent flier, but don't push people who can already barely afford to fly out.

No, it's the other way around. If flying is bad then poor people absolutely have to be priced out of it. I know that it sounds absolutely awful, but unfortunately taxing just business and first class won't do much for reducing emissions if flying will be affordable for and used by billions of people.