B. ditches and drains lead into them
C. rivers become too swift
D. snow melts more rapidly nowadays
35. The floods which are given most publicity______.
A. cause no damage
B. cause the most damage
C. cause less agricultural damage than the many smaller, more frequent floods
D. far exceed the smaller, more frequent floods in agricultural loss
Mobile Phone and Diseases
A study by scientists in Finland has found that mobile phone radiation can cause changes in human cells that might affect the brain, the leader of the research team said.
But Darius Leszczynski, who headed the 2-year study and will present findings next week at a conference in Quebec, said more research was needed to determine the seriousness of the changes and their impact on the brain or the body.
The study at Finlands Radiation and Nuclear Safety Authority found that exposure to radiation from mobile phones can cause increased activity in hundreds of proteins in human cells grown in a laboratory, he said.
We know that there is some biological response. We can detect it with our very sensitive approaches, but we do not know whether it can have any physiological effects on the human brain or human body, Leszczynski said.
Nonetheless the study, the initial findings of which were published last month in the scientific journal Differentiation, raises new questions about whether mobile phone radiation can weaken the brains protective shield against harmful substances.
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