If everyone stopped traveling for fun, that would reduce greenhouse gas emissions even more. You’re not going to guilt people into changing their behavior. A carbon tax fixes this.
I'm not willing to agree that it would reduce emissions more than ending meat consumption. It would help, however.
Like most problems, there is not just one solution. Multiple modest to moderate changes in behavior can make a big difference.
- redesign cities to include more and better public transport (less car/truck traffic)
- reduce general product consumption (less global shipping) - we all know there's a lot of worthless stuff that gets manufactured and shipped, such as the low-end products you find in Walmart which break or fail after a short period of time
- create permaculture food forests in and around cities (reducing global shipping of produce)
- eat less meat (reducing production and transportation emissions)
To put it into perspective, it's a bit like getting fit and losing weight. Yes you can radically change your diet, or you can do crossfit every day, but those narrow+deep efforts are usually very unpleasant and unsustainable (in terms of a human's ability to keep with the changes). Instead, some diet changes, some consistent exercise, some lifestyle changes (walking/biking in place of some car drives) tends to result in lasting health benefits.
> A carbon tax fixes this.
Not really. A carbon tax encourages projects like mass forest planting of monocultures. That will result in some problem down the road.