These kinds of guidelines for abstinence all add up to an approximation for "don't exist". People persuaded into this lifestyle will have a negligible effect on the climate, because the vast majority of people will keep living their lives in a way that they seek enjoyment and fulfilment, rather than as an exercise in minimising their impact on the climate.

It's okay for the small minority of motivated people to forgo enjoyment in pursuit of this ideal, but just don't be mistaken into believing that it will have a measurable effect.

The only real solution is to make natural human behaviour non-CO2-emitting.