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.
Answer:
It stimulates rapid national economic growth.
Explanation:
Both international trade volume and trade structure towards high-tech exports result in positive effects on China's regional productivity.
The answer is d because our oceans are our unique features because we have permanent liquid water.
<u>Answer:</u>
The geography of the Americas and Oceania contributed to their unique development by providing them with the most favorable climatic conditions and abundance of valuable natural resources.
<u>Explanation:</u>
- The geography of the Americas and Oceania has been blessed with possibly the most diverse features than any other continents in the world.
- The Americas are surrounded by oceans on all the sides and so is Oceania.
- The availability of valuable natural resources in the Americas and Oceania has allowed the regions to prosper at a great pace.
- Land-forms favorable for various occupations, the existence of perennial water resources and various other factors like these have contributed to the unique development of the continents.
Answer:
32
Explanation:
stuff and things x chromosome