Earlier quoted context omitted.
15,000,000t×0.004 = 60,000,000kg. 60,000,000kg/63kg per car [1] ≈ 952,000 cars, about 55% of Tesla's production last year. [1] https://electrek.co/2016/11/01/breakdown-raw-materials-tesla...
Yikes, looks like EVs are gonna be resource-constrained real soon unless new battery tech emerges.
A 20 KG e-bike can get a person around with 0.3 BHP, so 200 KG and 30 BHP is already pushing the boat out.
But people want another order of magnitude on top of that.