Cheap energy – the end of an era?Peak OilPeak GasPeak CoalMarket concentration: who’s got the power?Diminishing returns: the EROI problemEnergy crunch: growing demand; inadequate investmentRelevant climate policiesCutting energy consumptionRenewablesNuclearFuel switchingCo-benefitsSecure energyAffordable energySafe, clean, sustainable energyEnergy access for allConflictsFossil fuels: ‘Drill, baby, drill!’?Nuclear powerVariable renewables: what happens when the wind stops?BiofuelsOther impacts of renewablesThe way forward