Electric cars are a critical subject, and are likely to remain so as buyers respond to knee-jerk legislation by turning to electric vehicles (EVs) – be it plug-in hybrid or pure electric. Sales of those cars eligible for the (now reduced) government plug-in car grant are up 30 per cent year-on-year in the UK according to the SMMT, with 26,482 registered in the first half of 2018.

Notwithstanding the issues of excavating precious metals, there is a significant environmental burden associated with plug-in cars that must be considered: the batteries.

The scale of the issue

Most modern EVs use lithium-ion batteries; much the same as those that power your phone, toothbrush, tablet and most portable electrical items. Given how unfathomably numerous these small batteries are, it says a lot that EV batteries are expected to account for 90 per cent of the lithium-ion battery market by 2025 according to a recent forecast by consultancy firm Roskill.

For a longer-range forecast, consider that the UK government intends for all new cars and vans to be plug-in EVs by 2040. Assuming the new car market remains as buoyant as it is now, that equates to about 2.5 million new cars – and therefore battery packs – each year.