Comment on “The challenge of energy-efficient transportation” J. Hermans

Keyphrases

• Primary Energy 100%
• Energy-efficient Transportation 100%
• Energy Use 66%
• Electric Car 66%
• Energy Density 66%
• Cyclists 66%
• Liquid Hydrocarbons 66%
• Energy Efficient 33%
• Carbon Source 33%
• Solar Photovoltaic 33%
• Energy Content 33%
• Transportation System 33%
• Recharge 33%
• Number of Sources 33%
• Liquid Hydrocarbon Fuels 33%
• Carbon Dioxide Emissions 33%
• Journey Time 33%
• Embodied Energy 33%

Engineering

• Liquid Hydrocarbon 100%
• Primary Energy 100%
• Electric Car 66%
• Flux Density 66%
• Photovoltaics 33%
• Energy Content 33%
• Fossil Fuel 33%
• Solar Photovoltaic 33%
• Embodied Energy 33%

Material Science

• Photovoltaics 100%
• Energy Density 100%
• Carbon Dioxide 50%
• Fossil Fuel 50%