THREAD: avoiding meat is often said to be one of the most powerful interventions to reduce one's greenhouse gas emissions. The wildest numbers are cited. Some groups (eg #EATLancet) are now lobbying to impose a 'meat tax' on us. Below some data to put this in perspective.

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Let's assume that a person's yearly impact in CO2-eq is somewhere half way between the USA and EU, say 12 t CO2-eq.

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Going vegetarian would mean an estimated reduction of 0.5 t CO2-eq/y, so about 4% difference. That is very far from halving your carbon footprint!

See also: https://www.project-syndicate.org/commentary/meat-production-overstated-effect-on-climate-change-by-bjorn-lomborg-2018-11

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If one also takes into account rebound effects, this would imply that only a 2% difference will be achieved. A meagre result, I'd say, while being stuck with a restrictive diet.

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So, why all the fuss about skipping meat? Shouldn't we at least also talk about the growing emissions caused by mass tourism? That upcoming trip to Ibiza, Florence, Paris, or Mexico?

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Or the impact of ICT that may well reach 14% in 2040? Nobody puts the blame on smart phones, so why exactly is that steak being criminalized? I'm even leaving aside the fact that the methane production from cattle is a very different story than fossil fuel-derived CO2.

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And why is it worse to eat meat than to keep a horse (>2 t CO2-eq/y) or a dog (1 t CO2-eq/y)? At least that is what media discourse seems to imply, being very noisy on the former but almost silent on the latter. Remember: going vegetarian =-0.5 t CO2-eq/y.

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We could look at the impact of clothing or the boatloads of consumerist junk that are filling up our houses, the way we overuse heating & airco, the cars we're driving, etc. - but no, we rather blame meat: symboling 'sin' & a convenient scapegoat. One that opens up markets.

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