text: The advantages of limiting car usage has both positives and its negatives. The negative only affects one person, usually, and the positives have an affect on everyone else's health and the global enviroment and make countless other minute differences in the world. The global effort to inhibit the production of smog. greenhouse gas emissions, and any other pollutant that makes the quality of air unfavorable has really come along way in the past few decades since its realization. So why not hang up the keys once in a while and take a bus to the store or walk to work.    In the article "Making Mona Lisa Smile," the author describes how a new technology called the Facial Action Coding System enables computers to identify humans emotions to see humans' reactions while they are using their computers. Computers can recognize emotions by the way you look, and it is allow to the computers to understand your feelings, and to change the topic because they used this technology to see Mona Lisa's emotions. "The process begins when the computer constructs a 3-D computer model on the face; all 44 major muscles in the model must move like human muscles." When technology developed they started their project with a 3-D computer.