“best thing we could do is mini-reactors in marine shipping”
I can see a use for small reactors in ships, but land-based infrastructure power sources are typically lower cost per unit of energy if they are large.
“Cargo ship pollution is WAY bigger than all automotive pollution put together”
I know you mean pollution from the fuel burned, but perhaps the greater pollution and general economic damage is caused by the cargo they dump in America and other places.
Already did that.
https://en.wikipedia.org/wiki/NS_Savannah
Lol...I mean you’re not wrong on that last point