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Study reveals hybrids could have up to 4.9X lifetime emissions vs BEVs

Credit: Toyota

A study from the International Council of Clean Transportation (ICCT) has revealed something quite interesting. While hybrid vehicles tend to be grouped together with battery electric cars as options for clean, sustainable transportation, they could be up to 4.9 times dirtier than comparable battery electric vehicles that are charged using renewable sources. 

As per the ICCT, its study considers model year 2024 vehicles, thereby representing the current state of the sustainable auto market. As part of its analysis, the ICCT assessed the life-cycle greenhouse gas (GHG) emissions of four common vehicle powertrains: ICE vehicles, hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), and battery electric vehicles (BEVs). 

The ICCT considered the GHG emissions that are related to the life cycle of vehicles, from manufacturing to disposal. This addresses a key anti-EV talking point which alleges that battery electric vehicles are dirtier than conventional cars because of the high emissions involved in the mining and manufacturing of batteries.

As per the ICCT’s study, battery electric cars are still the cleanest form of transportation today, especially if they are charged with renewable energy. But even if a battery electric vehicle like a Tesla is charged from a regular grid today, the ICCT’s study noted that BEVs are still superior to their ICE, HEV, and PHEV counterparts. Following is a pertinent section from the ICCT’s study.

“BEV sedans and SUVs have the lowest life-cycle GHG emissions across all powertrains. The GHG emissions of model year 2024 PHEVs (both sedans and SUVs) are roughly 2 times higher over their lifetime compared with BEVs powered by the average grid mix. Model year 2024 HEVs emit 2.2 times (sedans) and 2.5 times (SUVs) more than BEVs powered by the average grid, and conventional ICE vehicles emit up to 3.5 times (SUVs) more. Notably, compared with BEVs powered by 100% renewable electricity, this difference increases to 4.9 times more GHG emissions for HEV SUVs and 6.7 times more for conventional ICE SUVs,” the ICCT study noted. 

The ICCT also predicted that battery electric vehicles are only bound to get cleaner. “For new vehicles projected to be sold in 2030, the relative benefits of BEVs are even larger. Conventional ICE SUVs were estimated to have 7.5 times higher life-cycle GHG emissions than BEVs powered by 100% renewable electricity. This is due to the ongoing decarbonization of the electricity grid and improved efficiency of BEVs. Projected new PHEVs in 2030 emit 2.1 times (sedans) and 2.2 times (SUVs) more life-cycle GHGs than new BEVs powered by grid-average electricity,” the ICCT study noted. 

The ICCT’s study can be viewed below.

ID 180 – US GHGs Brief Final by Simon Alvarez on Scribd

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Study reveals hybrids could have up to 4.9X lifetime emissions vs BEVs
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