I thought we'd be closer to this point.  However, since Trump has unfortunately been deregulating many industries in the US. I think it's being stalled for years to come unless Europe somehow changes their mind as well. After watching the VW scandal on  Netflix,  it's hard to believe Germany will  change any laws. Each countries best interest is their citizens and economy.

I've read of folks making cars run on water. Those engineers are hired by car manufacturers and then never commercial anything because there is no money to be made. Business mainly see revenue for change.