Why the move to electric vehicles (1)
In the past few years there has become an increasing realisation that it is impossible to reduce emissions from petrol engines. This applies even more so to diesel engines (although to their shame, major European car makers used fraudulent methods to cover this up).
As our associated article Electric Vehicle History shows, there is not so much a move to electric vehicles – but a return to them. Almost all cars in the USA were electric from the late 1800s until 1920 or so. They were rendered obsolete largely because battery technology was stagnant – and that of petrol engines was not.
It is now virtually certain that about half of all cars will be electric by 2030, with the current part fossil-fuel/part electric hybrids being phased out as battery storage technology advances (to provide comparable range) and the recharge network becomes global.
There is minor possibility that we could see hydrogen used both as a fuel and for energy storage (it works well for both). Its major downsides are that it is very corrosive and because its molecular structure is so tiny, it is prone to leaking.