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Plug-in hybrid cars are more polluting than expected according to studyPhoto by Rathaphon Nanthapreecha on Pexels
Science

Plug-in hybrid cars are more polluting than expected according to study

Now4 September 2026 at 01:53

A study conducted by the International Council on Clean Transportation (ICCT), an environmental non-governmental organization, revealed that plug-in hybrid electric vehicles (PHEVs) are significantly more polluting than expected. The research identified a growing discrepancy between real CO2 emissions and the values measured during type-approval tests.

The analysis focused on plug-in hybrid vehicles registered between 2021 and 2023, a period during which the difference between theoretical emissions and actual emissions became more pronounced. This situation raises questions about the effectiveness of current environmental certification processes for automobiles.

The ICCT, as an organization specializing in clean transportation, points out that the results demonstrate flaws in the measurement methods currently used. Real consumption and emission data diverge substantially from the values officially declared by manufacturers.

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