Thank you for your question.
First of all, it depends if you compare acceptable and allowable levels for antennas, for example on base stations, or for mobile devices. With respect to mobile devices such as cellular phones, allowable levels in Canada, as in the United States, are lower, and therefore safer. They are lower, with respect to radiation, than those accepted by the ICNIRP—which you probably heard of last Tuesday—and which have been adopted by most countries in the world, including all European countries. They allow a level of 2 watts per kilogram, whereas Canada only allows a level of 1.6 watts per kilogram. We calculate an average based on 1 gram of tissue, which provides for higher results than those used in Europe, where the average is calculated on 10 grams of tissue. In technical terms, this is called "specific absorption rate". As for antenna towers, levels permitted in Canada are slightly higher than in certain European countries for example.
Furthermore, as my colleague Mr. Hill was saying this morning, actual levels measured in the field are often 1,000 to 10,000 times lower than those allowed by Security Code 6. So, if we were to measure levels here in Ottawa, we would find that in most cases, measurable levels are 1,000, 100,000 or 10,000 times lower than those allowable under Security Code 6.