In short, my question is this: did governments worldwide make the wrong choice by focusing fully on electric vehicles (in terms of road transportation emissions) to achieve the emissions reductions we need?
Obviously, reducing global emissions is a top priority, and cutting car tailpipe emissions (or even removing them entirely) must play a crucial role in achieving goals like net zero by year x. However: electric vehicles are not a great solution for this. Yes, of course, they do deeply cut emissions, but they are much heavier than hybrid or gas cars and therefore generate a lot more particular matter emissions. Basically: while we cut tailpipe emissions, we increase non-tailpipie emissions - which is a real problem for things like air quality. Additionally, there are serious issues around the need for rare earth elements and other materials to create batteries and the proper disposal of discarded batteries.
For those who are interested (and have access...) this review article from March 2023 in Science of The Total Environment (yes, a serious scientific journal) goes into those things, but they key points are nicely summarized in these two figures:
People might say that this is all very nice, but everything is better than allowing global temperature to continue rising, so we'll have to accept those new issues as the worst of two evils. That's what I used to think as well, but the full magnitude of these other problems (around non-tailpipe emissions and battery production and disposal) has slowly been dawning on me the past few months - while there are actually alternatives!
Or at least, one is already available: hydrogen-powered cars. Toyota and Honda already have working models. They're still expensive, there aren't many charging stations yet - sure, but that was all the same around electric cars until quite recently. Also, hydrogen had the issue of being dirty to produce: it's relatively clean as a by-product of gas production, but that will slow down when those industries scale down, and hydrogen is polluting when created on its own. But in recent years, natural hydrogen deposits have been found underground (see e.g. this article from Science), and those are currently estimated to hold enough hydrogen for humanity for centuries of use (or whatever the exact number was that I read elsewhere recently - but it's a very long period).
So again, did governments make the wrong choice, putting all our transportation eggs in the electric vehicle basket?
Obviously, reducing global emissions is a top priority, and cutting car tailpipe emissions (or even removing them entirely) must play a crucial role in achieving goals like net zero by year x. However: electric vehicles are not a great solution for this. Yes, of course, they do deeply cut emissions, but they are much heavier than hybrid or gas cars and therefore generate a lot more particular matter emissions. Basically: while we cut tailpipe emissions, we increase non-tailpipie emissions - which is a real problem for things like air quality. Additionally, there are serious issues around the need for rare earth elements and other materials to create batteries and the proper disposal of discarded batteries.
For those who are interested (and have access...) this review article from March 2023 in Science of The Total Environment (yes, a serious scientific journal) goes into those things, but they key points are nicely summarized in these two figures:
People might say that this is all very nice, but everything is better than allowing global temperature to continue rising, so we'll have to accept those new issues as the worst of two evils. That's what I used to think as well, but the full magnitude of these other problems (around non-tailpipe emissions and battery production and disposal) has slowly been dawning on me the past few months - while there are actually alternatives!
Or at least, one is already available: hydrogen-powered cars. Toyota and Honda already have working models. They're still expensive, there aren't many charging stations yet - sure, but that was all the same around electric cars until quite recently. Also, hydrogen had the issue of being dirty to produce: it's relatively clean as a by-product of gas production, but that will slow down when those industries scale down, and hydrogen is polluting when created on its own. But in recent years, natural hydrogen deposits have been found underground (see e.g. this article from Science), and those are currently estimated to hold enough hydrogen for humanity for centuries of use (or whatever the exact number was that I read elsewhere recently - but it's a very long period).
So again, did governments make the wrong choice, putting all our transportation eggs in the electric vehicle basket?