For the UK to meet their national target of net zero emissions as part of the central Paris Agreement target, further emphasis needs to be placed on decarbonizing public transport and moving away from personal transport (conventionally fuelled vehicles (CFVs) and electric vehicles (EVs)). Electric buses (EBs) and hydrogen buses (HBs) have the potential to fulfil requirements if powered from low carbon renewable energy sources.

A comparison of carbon dioxide (CO₂) emissions produced from conventionally fuelled buses (CFB), EBs and HBs between 2017 and 2050 under four National Grid electricity scenarios was conducted. In addition, emissions per person at different vehicle capacity levels (100%, 75%, 50% and 25%) were projected for CFBs, HBs, EBs and personal transport assuming a maximum of 80 passengers per bus and four per personal vehicle.

Results indicated that CFVs produced 30 gCO₂ km⁻¹ per person compared to 16.3 gCO₂ km⁻¹ per person by CFBs by 2050. At 100% capacity, under the two-degree scenario, CFB emissions were 36 times higher than EBs, 9 times higher than HBs and 12 times higher than EVs in 2050. Cumulative emissions under all electricity scenarios remained lower for EBs and HBs.

Policy makers need to focus on encouraging a modal shift from personal transport towards sustainable public transport, primarily EBs as the lowest level emitting vehicle type. Simple electrification of personal vehicles will not meet the required targets. Simultaneously, CFBs need to be replaced with EBs and HBs if the UK is going to meet emission targets.

为了使英国实现其净零排放的国家目标（作为《巴黎协定》中心目标的一部分），需要进一步强调对公共交通进行除碳并远离个人交通（传统燃料汽车（CFV）和电动汽车（EV）） ）。如果使用低碳可再生能源供电，则电动巴士（EBs）和氢气巴士（HBs）有可能满足要求。

在四个国家电网电力情景下，比较了2017年至2050年由常规燃料公共汽车（CFB），EB和HB产生的二氧化碳（CO ₂）排放量。此外，假设CFB，HB，EB和个人交通工具在不同车辆容量水平（100％，75％，50％和25％）下的人均排放量假设每辆巴士最多容纳80名乘客，每辆私人车辆最多容纳四名乘客。

结果表明，到2050年，CFV的人均排放量为30 gCO ₂ km ^-1，而CFB的人均排放量为16.3 gCO ₂ km ^-1。在100％容量下，在两度情景下，CFB排放量是EBs的36倍，9到2050年，其排放量将比HBs高出12倍，比EVs高出12倍。在所有用电情况下，EB和HBs的累积排放量仍然较低。

决策者需要集中精力鼓励从个人交通工具向可持续公共交通工具的模式转变，主要是排放量最低的电动汽车。个人车辆的简单电气化将无法达到要求的目标。同时，如果英国要达到排放目标，则需要用EB和HBs代替CFB。