Answer:
it's zero
Explanation:
it is there is your answer
Let's see: frequency of cellular phone waves (GSM phones) is (800-1900 MHz). If we look at the table of the electromagnetic spectrum, we can see that this range is contained within the frequencies of the microwaves, which include waves in the range 300 MHz-300 GHz.
So, summarizing, the correct answer is "microwaves".
Meters Micrometers centimeters millimeters
<span>Scientists have documented that the current level of carbon dioxide in the atmosphere is increasing.</span>
