On today's date, Feb. 21, in 1994 Whirlpool began producing a new type of refrigerator. The more efficient and improved fridge functioned without freon — a component that is bad for the atmosphere. To commemorate the fridge's first step towards becoming green, I've put together a fun little quiz. I've found images of refrigerators throughout time and you have to choose what year they were manufactured in. Sound like fun? Take the quiz now!