If you’re like most drivers, you probably turn your car lights off when you leave your vehicle. But is that really the best way to conserve energy? Turning off your car’s lights can actually waste a lot of energy. The reason is simple: When you turn off your car’s headlights, the engine has to work harder to generate light. This increases fuel consumption and emissions. So if you’re trying to save energy, it’s better to leave your car’s headlights on even when you’re not driving. This way, the engine will only have to work as hard as necessary to generate light, which will save fuel and emissions. ..