Electric cars made only of woody fibres and fabrics, with the power generated by pedals. Oh, wait ........... the motors and wires have to be made of metal (mining, fossil fuel use, smelting, forging, casting,pollution, etc). They should probably just walk everywhere. Then they’d be too tired to preach at the rest of us. ?

And also pollutes the world
EVERYONE should drive only electric, or other non-toxic emission vehicles.

...but most power stations are fueled by the same Vegans should run!

Clearly a well thought out thought experiment