摘要: |
Transportation is currently the least-diversified
energy demand sector, with over 90% of global
transportation energy use coming from petroleum
products [1]. For more than a century, petroleum
fuelshavebeenreliedupontomovepeopleandgoods
within and between towns and cities, and on roads,
railways, farms, waterways, and in the air. These
energy-dense fuels have unquestionably provided
reliable and convenient mobility options to power
the modern global economy. However, these benefits
have also created challenges associated with geopol-
itics, energy security, price volatility, and environ-
mental impacts. |