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flag PHEVs emit nearly 5x more CO2 in real driving than lab tests show, undermining their environmental benefits.

flag Plug-in hybrid electric vehicles (PHEVs) emit nearly five times more CO2 in real-world driving than lab tests suggest, a European Union study of 800,000 vehicles from 2021 to 2023 found. flag Real-world emissions rose from 3.5 to 4.9 times higher than lab results over that period, with PHEVs only cutting CO2 by 19% compared to gasoline cars—far below the 75% reduction assumed in testing. flag Experts attribute the gap to low actual electric usage, averaging just 27% versus an assumed 84%, due to underpowered electric motors and driver behavior. flag The findings raise concerns about the environmental benefits of PHEVs and highlight flaws in current testing standards.

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