Re: telephones
Hv , this is something that interests me, I use phones as little as possible because I don't think there has been enough study done about possible problems from radiation emmissions from cordless or mobile phones. I do think that cordless phones(because of the frequency) are probably safe, but I think there needs to be a lot more testing.
The higher the frequency of electromagnetic waves the more dangerous to humans they are. Radio waves (especially lower frequency radio waves) are not harmfull to humans. Mobile (
Cell Phone s) use full duplex radio waves to send and receive simultaniously. Devices such as walkie-talkies etc use only half duplex, which is why you cannot send and receive at the same time.
There is some controversy over very low frequency electromagnetic waves as well , but thats a whole other story.
There is some good info on this site,
http://www.cancer-health.org/
Until further testing is done, I would err on the side of caution when using mobile phones, or cordless phones.
spud