Global transportation CO2 emission share by subsector 2050

The transportation sector is one of the largest contributors to greenhouse gas emissions in the world. Emissions from heavy-duty vehicles and light-duty vehicles are expected to contribute to the largest share of carbon dioxide emissions from this sector, totaling 38 percent and 36 percent, respectively. In comparison, shipping is responsible for a much smaller share of emissions, with international shipping creating the bulk of these emissions. Most of the fuel used for transportation is petroleum based, including gasoline and diesel. Mitigating emissions Emissions from the transportation sector main arise from fossil fuel combustion for cars, trucks, ships, trains, and airplanes. Without aggressively implemented mitigation policies, greenhouse gas emissions are expected to rise over the next decades. Demand for transportation in emerging regions is currently lower than in developed countries; however, it is expected to rise much quicker in the near future due to increasing incomes. Direct emissions from the transportation sector can be reduced by avoiding journeys and behavioral changes, improving vehicle performance technologies, using low carbon fuels, and investing in transportation infrastructure.

全球交通运输领域是全球温室气体排放的主要贡献者之一。重型车辆和轻型车辆的排放预计将占该领域二氧化碳排放的最大份额，分别达到38%和36%。相比之下，航运对该领域排放的贡献份额相对较小，其中国际航运产生的排放量占主导地位。交通运输领域所使用的燃料大部分基于石油，包括汽油和柴油。在缓解排放方面，交通运输领域的排放主要源于汽车、卡车、船舶、火车和飞机的化石燃料燃烧。若不采取积极实施的缓解政策，预计未来几十年温室气体排放将持续增长。新兴地区的交通运输需求目前低于发达国家；然而，预计在不久的将来，随着收入的增加，需求将迅速上升。通过避免出行、改变行为、提高车辆性能技术、使用低碳燃料以及投资交通基础设施，可以减少交通运输领域的直接排放。