An oft-cited reason to stop riding horses in cities was their prodigious output of excrement as a by-product, not to mention disposal of dead and rotting horse carcasses. Both of these could have been easily solved problems (Golden Gate Park owes its lush environment to train carloads of manure being dumped on sandy dunes — … Continue reading As Legged Mobility Improves Efficiency, Wheeled Transit Appears Toxic to Environment

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