A severe restriction of world trade, transport and tourism must be an inevitable knock-on effect of the 2030 drivers, and changes will need to be made urgently if widespread hardship is to be avoided. Ships will need to be powered by sail, fuel cells or coal, and nuclear propulsion is certain to be advanced as an option. Cars will have to be smaller, and use new technologies. Magnetic levitation trains run by solar arrays beside the track could link the new energy conserving habitat forms outlined in Chapter 15, and are likely to replace internal air services. Quite innovative new devices such as unmanned solar powered airships could be useful freight carriers in some parts of the world where high winds are unusual. ...

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