> Zero operating emissions Could it be clear to everybody that this thing will require energy and thus will, in a way or another, emit somthing (either CO2 fro

> Zero operating emissions Could it be clear to everybody that this thing will require energy and thus will, in a way or another, emit somthing (either CO2 from electricity production or CO2 from the construction of means of electricity production). Besides, why not just invest in trains ? (or lighter alternative if any)