Earlier this week, Elon Musk, the Tesla boss, asked his 52.5million Twitter followers what the future would hold.
For the tycoon, it might augur a £9billion bonus, thanks to the surging sales of Tesla models which, like other electric cars, are increasingly popular.
The battery technology that powers these vehicles is seen as a way to slash carbon emissions – the planet-friendly goal now being pursued by the US, Britain and other governments.
The UK plans to phase out sales of all non-electric cars by 2035. But does this technology, despite its planet-friendly credentials, also have downsides for those who aspire to invest more ethically?