ABSTRACT
Our global transport system is already responsible for a quarter of global greenhouse gas (GHG) emissions. In the next three decades, the global vehicle fleet will grow from 1.2 billion to 2 billion vehicles, passenger flights will increase by 130%, and cargo tonne-miles at sea will expand by 35%. Can we accommodate that growth while reducing emissions? The short answer is that much of transportation will decarbonize, and emissions will reduce by some 40% by mid-century. But by then the relative contribution of transport to global emissions will have risen to one third, implying that the sector needs to tackle decarbonization with a much greater sense of urgency.
