Germany has launched a campaign to preserve plug-in hybrid vehicles, a type of car that combines an internal combustion engine with an electric motor, as they continue to attract buyers across Europe. Although these cars can operate emissions-free over short distances, most owners rarely charge their batteries and instead rely heavily on gasoline or diesel.
A study by the environmental group Transport & Environment, which analyzed 127,000 plug-in hybrids, found that their CO₂ emissions are nearly five times higher than what manufacturers report under the WLTP testing cycle.
The German Association of the Automotive Industry (VDA) has...