Cell phone can be dangerous

Do you know that for 2017 the number of mobile phone users is forecast to reach 4.77 billion? Nowadays, cell phones are the most usefully invention in the world. They can provide us with everything, for example videoconferencing, internet, e-mail, communication and etc. It’s hard to imagine how life would be without cell phones. Now modern cell phones have many advantages and are all in one device, but they can heavily affect our lives. Have you ever heard, that cell phones can be dangerous? Using cell phones involve risks of cancer or even death.