text: Also, limiting car usage means less pollution. No more car emissions would be trapped from those cold nights and warm days. There would not be smog also. Cars are stressful and rather than a car use a two-seated bike. Lots of new things can be made in a city rather than cars which are so much distractions.    The technology to read students' emotional expressions known as the "Facial Action Coding System" is helpful and valuable. The advanced technology could help modify a lesson on a computer when a student is showing signs of boredom, help with communication skills, and tell whether or not a person or celebrity is lying due to facial muscles.