The document discusses the usage of mobile phones in public places and some of the dangers. It notes that over half the population in many countries now use mobile phones. Using mobile phones while driving or walking can be dangerous and has led to increases in pedestrian deaths and car accidents. Specifically, texting while driving causes over 300,000 injuries per year in the US. The document recommends only using mobile phones for important purposes and not when driving or walking as a way to reduce accidents.