Car air fresheners were first introduced in the 1950s to mask undesirable odors in vehicles. Early versions included scented pucks, gels, and sprays placed throughout the car. In the 1960s, modern hanging air fresheners became popular. These were shaped like trees or fans and hung from rearview mirrors. Popular scents in the early years included floral, pine, and citrus. In the 1980s,... https://www.zupyak.com/p/4453092/t/car-air-fresheners-keeping-your-ride-smelling-fresh