Even assuming that enough lithium, cobalt, nickel and phosphate can be mined, and there is some question regarding reserves of lithium, getting those permits and setting up the mining will take years and years. Most of the lithium and cobalt, and I suspect nickel, are being mined in countries that have, shall we say, very lax environmental regulations to say the least. Then there's the problem of labor with child labor being a frequent source not to mention the extremely low pay, even by the standards of the countries involved.
Going to EVs is not the trip down a sunny lane filled with unicorns and rainbows it's being sold as. Can it be done, sure but with some serious caveats.
We visit some friends that live about 600 miles away. In my good old ICE vehicle it's a simple one day drive with a twenty minute stop to fuel up along the way. In an EV, it's more like a two day trek because we'd need to stop somewhere and charge the EV back up again. Same thing on the way home. Battery capacity is the limiting factor and simply increasing the battery capacity is an operation of diminishing returns. The majority of the vehicle weight is the batteries. Making them bigger means significant amounts of more weight, more breaks to stop the thing, better rated tires to support them and, probably a larger vehicle to house them (unless you want to sit at the height of a pick-up in your net looking sedan/coupe. Note that the Hummer EV weighs about 10,000 pounds, five tons just to get the same range, almost, as a Tesla or Volt style vehicle.
Another thought for you....Let's say 50% of the people have an EV as their transportation. A major hurricane is headed for the south, either Florida or the Gulf Coast. What's evacuation going to look like when all those people who are trying to get out of the way have to stop and recharge their EV? Can you say a manmade disaster?
Ramping up the electric grid has to happen and that will take a long time even if permits are expedited and no lawsuits get filed. Generating capacity will also need to be increased which means more permits, law suits, injunctions, show cause orders and whatever else can be used to slow or stop their construction.
Then there's the problem of charging stations and the total lack of standards for how they work and even what kind of plug is needed. I just saw that Ford is giving their dealers a choice of two tiers of dealer standing for their EVs. The difference is one fast charging station versus two fast charging stations. The difference in cost to the dealer is about 1.2 million to get the higher rating. That seems to make fast charging stations a tad on the expensive side. Unless that kind of problem gets eliminated it's not going to work out well.
What makes it all really hilarious to me is that it's all being "driven" by California. A State where the electric grid is held together with chewing gum wrappers and they won;t even let the power companies trim the trees and clear the brush from the high line right of ways. More guaranteed failure.
All of this to potentially reduce the temperature by 0.02 degrees over the next 100 years. If the sunspot cycle drops off it'll cool more than that.