Parallel hybrids are vehicles that use both an internal combustion engine and an electric motor to power the wheels. In this system, both power sources can work together or independently, allowing for improved fuel efficiency and reduced emissions. The electric motor can assist the engine during acceleration or operate alone at low speeds. These hybrids typically have a simpler design compared to series hybrids, as the engine and motor are connected to the same drivetrain. This configuration allows for a more efficient use of energy, making parallel hybrids a popular choice among environmentally conscious consumers and manufacturers looking to meet emission regulations.