Worth noting that with the current US electrical grid an EV produces about half to too thirds of the pollution per mile, and is expected to be down to one third by the time a new electric vehicle bought today reaches the end of its life. Given that cars represent a significant portion of the transportation sectors carbon emissions, which in turn represent theory percent of the US entire emissions, I wouldn’t call halving that inside ten years insignificant, especially as there is no practical alternative that could be implemented on a similar time scale that would be prevented by said EV adoption.

It’s also practically possible to decarbonise electricity, indeed renewables are now cheaper than fossil for new electrical generation even accounting for their intermittence, while it’s not really feasible to do so with oil. While carbon capture is a thing, it hasn’t been able to scale well dispite having been thrown money at for nearly fifty years now and there industries like aviation that can pay a lot more to get first dibs on said fuel.

Lithium is hardly particularly damaging to the environment to mine when compared to most other mining operations, like in the case of the worlds largest lithium producer’s(Australia) the coal mines next door. Cobalt actually isn’t that relevant in mass adoption scenarios as it’s cost means it tends to be completely absent in most adorable mass market EVs which currently tend to use LFP as compared to lithium ion or nickel cadmium.

As for recycling batteries, you just toss them in a industrial scale dielectric bath crusher and treat the output as absurdly high grade lithium-cobalt ore. The reason it has been slow to scale is not technical difficulty but rather a lack of demand, as even the first model S(one of the first properly mass produced EVs) will still have over two hundred of its two hundred and sixty mile range today. Given that one can cross the entire US with only a hundred mile range, there is still a lot more demand for reusing such cars then you get from the batteries scrap value even before considering the demand for cheap large scale batteries for things where that loss of power density doesn’t matter.

After the used and crashed market reaches maturity and we go from being able to just reuse them, recycling will actually become a significant strength of EVs, as a majority of the emissions are in battery mining, and thusly only happen once. We have a 97% capture rate on lead acid car batteries today, and thouse are only worth dozens of dollars in material, not thousands, so I hardly expect any to make their way into landfills in sufficient quantities to compete with the byproducts of even just refining oil on water and soil conditions.