Do you think that one person (or even ten people) eating less meat will offset the carbon emitted by the global airline industry?
Sure, doing all these things will make everybody better off, but it is not a solution to the problem.
I hope you misspoke there, because nobody in their right mind would suggest that
one person eating less of anything could (by itself) offset the entire airline industry. But humans are not just individuals. What one person does, others will do too if they have a mind to. Individually our actions are insignificant, but collectively we can have a powerful impact (which is how we got into this mess).
Of course no one thing is a complete solution.
But flying less will certainly help reduce the carbon emitted by the 'global airline industry'. 80% of air transport emissions come from passengers, 20% from freight. So don't be concerned about small items shipped by air, but stay off airplanes yourself!
Air travel currently only accounts for ~2.5% of global emissions, however it is expected to grow rapidly in the future, as it was doing before the pandemic. We need to reverse that trend! Another factor to consider is that airplanes inject CO
2 into the atmosphere at a higher altitude where it has more effect. When all greenhouse impacts are included, aviation is currently responsible for at least 3.5% of warming. In the future it could reach 5% or more - if we don't cut back.
But would cutting back on meat be enough to offset that? Hell yeah! Provided enough of us do. Food production accounts for 35% of total global emissions, and
meat is nearly 60% of that or ~20% of the total. If only 1 person in 10 stopped eating meat, or 1 in 5 halved their consumption (as I have) it could be enough to offset aviation emissions.
The real solution is to cut back everywhere we can - targeting those areas that are easiest and have the largest impact first. At 60% of food production emissions and very easy to cut back on, meat is a 'no-brainer'. Air transport is very hard to clean up, but not hard to cut back on. In both cases the benefits could easily outweigh the 'sacrifice'.
Most westerners eat far too much meat, and air transport is expensive. By cutting back on excessive consumption you save money both directly and in lower healthcare costs, as well as feeling better. So even if your
individual impact on the environment is negligible you still come out on top. Why
wouldn't you do it?