There is an isotope that is much easier to break down, which is found in vast quantities on the Moon. (H3)
As far as electric cars, has there been any impact studies on the effects of all the Ozone emissions they will generate? It seems that when any new technology is advanced en mass, it emerges with countless oversights and unforeseen difficulties.
Fusion power is still not practical, and has barely put out enough energy to sustain itself for a few seconds, maybe minutes. Even with helium 3, it still has way too many issues with plasma containment to be a net energy producer.
The best battery so far has less than 1/10 the energy density of gasoline/diesel, when it reaches at least the halfway mark, and can stand repeated deep discharge cycles for years on end, then maybe we’ll have practical electric cars.
My prediction: Our grandchildren will be using gasoline/diesel for transportation and making electricity with nuclear fission (in LWR reactors), and coal/gas/oil fired boilers driving steam turbines with a fewf combined cycle gas fired plants for peaking and swing loads.
Quite the opposite. Helium-3 would be used in fusion reactions, not fission reactions. And fusion has been "just around the corner" for about 50 years. They only need another 20 years, and in 20 years, they'll need another 20 years.