With the phasing out of several UK nuclear plants in the coming years there is speculation that there will be significant shortages in the electricity supply chain at current demand let alone the charging of several million electric vehicles although the smart meters will help a little.
I read awhile ago (can't find the report) that the worlds demand for Cobolt will increase 28 x by the 2030's to supply the industry's demands this may be even greater if the number of 'Gigafactories' increase massively, an alternative
battery technology needs to be found. Lithium-ion technology may have reached it's limit.
As a stopgap the Carbon neutral petrol/diesel/aviation fuel that I linked to the other day could help especially for planes and any surplus carbon captured could be stored underground.
I look forward to the day when we live in a really clean (pollution wise) environment but I think that is further away than the politicians suggest.