There are three main reasons why people are concerned that cell phones (also known as “mobile” or “wireless” telephones) might have the potential to cause certain types of cancer or other health problems:
Cell phones emit radiofrequency energy (radio waves), a form of non-ionizing radiation, from their antennas. Tissues nearest to the antenna can absorb this energy.
The number of cell phone users has increased rapidly. As of December 2014, there were more than 327.5 million cell phone subscribers in the United States, according to the Cellular Telecommunications and Internet Association. This is a nearly threefold increase from the 110 million users in 2000. Globally, the number of subscriptions is estimated by the International Telecommunications Union to be 5 billion.
Over time, the number of cell phone calls per day, the length of each call, and the amount of time people use cell phones have increased. However, improvements in cell phone technology have resulted in devices that have lower power outputs than earlier models.
The corecct anwser would be C mongolia. This is known as the 3rd most least densely populated countries in the world. with Greenland in 1st and Falkland Islands as 2nd.
Answer:
you can find where your at when lost and help get you back to where you need to be. maps can also take you to places you have never been witch is very fun to go explore, most maps have keys witch will help you find out whatever is or where everything is at. maps can also take you to short cuts, which makes life easier.
Explanation:
Less than ten feet above sea level
The sun shines in summer, whereas it does not in winter...
