The sun's high-frequency ultraviolet rays and medical and dental x-rays are examples of which type of radiation?
A) Nonionizing
B) Ionizing
C) Alpha wave
D) Microwave
Question 2
The percentage of trash that could potentially be recycled in the United States is estimated to be as much as
A) 60 percent.
B) 70 percent.
C) 80 percent.
D) 90 percent.