I would encourage plug-in hybrid users to not use their cars as gasoline vehicles with just a 15-liter gasoline tank.

A European environmental organization proposes reducing the fuel tank size of plug-in hybrids from 51 liters to 15 liters to encourage more frequent charging. This idea, revisited by Transport & Environment (T&E), aims to address the issue of high CO2 emissions from these vehicles, which are reportedly six times higher than official tests suggest. The smaller tank would limit driving range on gasoline, prompting owners to charge their batteries more often. T&E also recommends that by 2030, plug-in hybrids should have a minimum electric range of 200 kilometers and improved charging capabilities. However, the European Commission has stated it has no plans to implement such regulations, highlighting practical concerns about reduced flexibility for longer trips and increased vehicle costs.