With the increasing of mobile phones' functions, people rely more and more on them. The lower price also enables the mobile phone to become people's daily necessity. Now even many students have their own mobile phone. People began to worry about the cell phone which will do harm to our health.
But why people become worried about that? There are some speculates that cell phone might potentially threaten human being's health.
Mobile phones can emit radiofrequency energy (radio waves), which is constituted by non-ionizing radiation. Things closest to the cell phones will absorb this energy. According to the Cellular Telecommunications and Internet Association, as of 2010, there were more than 303 million subscribers to mobile phone service in the United States, which is nearly three times than the 110 million users in 2000. Globally, the number of mobile phone subscriptions is estimated to be 5 billion by the International Telecommunications Union. The number of mobile subscriptions has already increased quickly. (Cell Phones and Cancer Risk, 2012) The chart below (Chart 1) shows the number of mobile Internet users, including the prediction of the number in 2013. Over time, the amount of time of each phone call, as well as the number of people using the mobile phone has increased. Mobile phone technology has also had a very big change.
Chart1: US moblie Internet users & penertration, 2008-2013 (millions and % mobile phone subscriers)
To my way of thinking, cell phones will really have a health hazard.
RF is a potential threat to human body. Radiofrequency energy (RF) is a form of electromagnetic radiation. Electromagnetic radiation can be defined into two types: ionizing (e.g., x-rays, radon, and cosmic rays) and non-ionizing (e.g., radiofrequency and extremely low-frequency or power frequency). (Cell Phones and Cancer Risk, 2012) As we know, all of the creatures and plants, including humans, are exposed to ionizing