3 ms·Missing: “In tunnels” :-)by trevyn 9y agoMissing: “In tunnels” :-)Sharlin 9y agoSpending hundreds of millions to billions to cater for a hopelessly unsustainable form of transportation? Not good.trevyn 9y agoUnderground mass transit is unsustainable? I don't understand what you mean.Sharlin 9y agoWell, not mass transit, no. I thought you referred to tunnels for private cars, à la Musk's ambitions.