What does a hybrid car engine do while waiting at stop light?

When a hybrid car is waiting at a stop light, its gasoline engine typically turns off to conserve fuel. The electric motor can then power the car's electrical systems, such as the air conditioning and radio. This helps to improve the car's overall fuel efficiency.

Some hybrid cars also have a start-stop system that shuts off the gasoline engine when the car is stopped and restarts it when the driver takes their foot off the brake pedal. This can further improve fuel economy.

Overall, hybrid cars offer several advantages over traditional gasoline-powered vehicles, including improved fuel efficiency, reduced emissions, and quieter operation. These benefits make hybrids a more environmentally friendly and efficient choice for many drivers.