What comes after diesel?

Diesel fuels our economy, but its malign influence on air quality, contribution to climate change and the inevitable drying up of oil wells means this cannot last forever. Gareth Simkins investigates the alternatives

Promising technology or “slightly bonkers”? Siemens and Scania’s hybrid lorry uses power from electric cables strung over a 2km stretch of Swedish motorway. Photograph: ScaniaDiesel is beset by insurmountable problems. It is toxic. Burning it emits greenhouse gases and deadly air pollutants. And as a fossil fuel, we will have to replace it before supplies start to dwindle.

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