A cordless phone is a two-way radio, it has a transmitter and a receiver. When a person makes a call, the voice audio is converted to the nearest base station. Cell phones have a type of wave called radio waves that carry information and travel through the air at the speed of light. The waves may be absorbed or reflected by surrounding objects before reaching their nearest base station. Cell phone usage has increased at a very high rate over the past ten years. In 1988, approximately 500,000 cell phones were installed in the United States. Then, in 1993, cell phone usage increased rapidly, reaching 13,000,000 people. In 2006, there were over 233 million cell phone users and there are more to come. Cell phones harm a wide range of people from different age groups and children are the ones who are most affected every day. Today, more than 2 billion cell phone users are exposed to the dangers of using a cell phone and the worst thing is that people are not really aware of the harmful effects that cell phones cause on them. Studies at Orebro Hospital in Sweden reveal that children are particularly at greatest risk of brain tumors because they have smaller brains and lower skull bone density. The World Health Organization has declared that any type of wireless device that uses microwaves to communicate is potentially carcinogenic to humans. Researchers have studied and found that adults who have used a cell phone for more than 10 years are more likely to have brain cancer, salivary gland cancer as well as rare eye cancers on the side of the head where it is placed the cell phone. dangerousCell phone ... middle of paper ...... response, stress and memory problems. Dr. Siegal Sadetzki and some colleagues at Tel Avio University in Israel have discovered that excessive use of cell phones can cause salivary gland tumors. Another research conducted at Orebro Hospital in Sweden reveals that children are at particularly higher risk of brain tumors. because they have smaller brains and lower skull bone density. The WHO (World Health Organization) has classified cell phones or any other type of wireless device as carcinogenic (capable of causing cancer) to the human body. There are ways to reduce the dangers caused by cell phones; If you carry a cell phone, it should be in your purse and should not be placed against your body, it should be a few inches from your body. Cell phones should be used on speakerphone and kept away from your head. You should always plug in headphones.