[DominikPeters]

Is that 3% number associated with meat production in the USA or with meat consumption in the USA? If it's the former, then 3% would be an underestimate of the impact of reducing meat consumption, since the 3% doesn't include the emissions impact of feed and livestock that is imported.

[vasco]

That is true, but I think the point stands. As (mostly) programmers we're quick to understand and make use of practical rules like Ahmdal's law[1] for optimizing software, and know that you always start by looking at the parts that take the longest. Yet in real life we're sometimes tempted to optimize at the fringes first and ignore the obvious biggest contributing factors first.

[1] https://en.wikipedia.org/wiki/Amdahl%27s_law#Serial_programs

[shlant]

or maybe it's possible to address multiple sources of a problem simultaneously?

I see this "not as bad as" fallacy again and again in various different discussions and it is mainly used to downplay issues by comparing them to something worse. There is absolutely no reason we cannot discuss and address one issue without it taking away from other (possibly more impactful) issues. Some issues have less impact but are easier to to solve, and some have more impact but are harder to solve. We absolutely can (and should) work to address them at the same time.

[vasco]

If one is 3% and the other 80%, any effort put on the 3% is only useful to distract from the 80%. It's wasted time. So ideally you don't do both, you focus on the things that matter.

[shlant]

> any effort put on the 3% is only useful to distract from the 80%

How is it a distraction to address the percentage (however small) that we can have as individuals while the larger problems are solved through legislation/technological advancements? They are not mutually exclusive. It's not like people/organizations/governments can only think about/propose/implement one change at a time. It's like making the argument that nobody can do any work on smaller bug fixes while the main code branch is being compiled. Both contribute to the success of the whole, but neither are mutually exclusive given enough manpower (which the world undoubtably has). You can certainly work on hobby projects at home without it taking away from your work in the office.

when we are at a tipping point for climate change and every bit of reduction in greenhouse gases matters, plus the fact that most of the contributors aren't easily affected at an individual level, there is no reason to not address both simultaneously. How most individual humans currently live is unsustainable, period. If we actually want to ensure the continued survival as a species on this planet, we are going to have to change our individual habits at some point. There is no amount of carbon capture/tax that can undo or prevent the destruction of the planets natural resources. You have to address the underlying unsustainability, not just treat the symptom.

[bluesign]

I think it is also related to efficiency, most gain with minimum efforts