Not so fast, the 'expert's constant demand logic is true in the transportation sector but, as Erik Lindberg says, "While the transportation sector is responsible for a lot of our emissions, the carbon footprint of any one individual has much more to do with his or her overall levels of consumption of all kinds—the travel (especially on airplanes), the hotels and restaurants, the size and number of homes, the computers and other electronics, the recreational equipment and gear, the food, the clothes, and all the other goods, services, and amenities that accompany an affluent life."
Transportation is often a real need - ambulances, fire trucks etc. or to transport foods in times of distress, even getting to work is a necessity in our world. Demand for transportation fuels remains constant, what dropping everywhere is discretionary spending by consumers on what economists call 'luxury goods' and i call needless crap. Demand for every commodity is slowly dropping as a result of the slow global drop in crap consumption especially by people already hobbled by debt from earlier crap purchases.
Ask McDonald's, the ultimate symbol of needless crap IMO, whose sales have been dropping for years [see graph above]. Ask the retail experts about the dying shopping malls speckled across the United States. According to longtime retail consultant Howard Davidowitz, "Numerous midmarket malls, are going, going, gone,” Adding. “They’re trying to change; they’re trying to get different kinds of anchors, discount stores … [But] what’s going on is the customers don’t have the fucking money. That’s it. This isn’t rocket science.”
Rolling Acres Mall Central Atrium...nowadays
Maybe humans will evolve toward Holmgren's vision of how "a permaculture way of life empowers us to take responsibility for our own welfare, provides endless opportunities for creativity and innovation, and connects us to nature and community in ways that makes sense of the world around us" aided by the excellent pre-industrial agricultural land we paved on the way up. Already trees are growing through pavement and tumble weeds are again rolling unobstructed in the parking lots. Who could ask for more.