Summary:
- Plug-in hybrid electric vehicles (PHEVs) are a type of car that can run on both electricity and gasoline. They have a battery that can be recharged from an electrical outlet.
- A recent study found that many PHEV owners don't charge their vehicles as often as they should, relying more on the gasoline engine instead of the electric battery.
- This means PHEVs may not be as environmentally friendly as they could be, since they are not using the electric mode as much as they are designed to.