RADON GAS AND ELECTROMAGNETIC FIELDS (EMF'S)
These are two areas that in the last decade a great many studies have indicated reasons for major health concerns, such as cancer and the immune system. Presently we have the technologies for diagnosis and taking corrective measures for these pollutants in our home.

ELECTROMAGNETIC FIELDS (EMF's)
These are radiations deriving from high-voltage power lines, to low-voltage distribution lines on the street and in the home, televisions, radios, refrigerators, microwave ovens, communication systems, faulty electrical wiring, etc. Electromagnetic radiation is part of the total energy spectrum that includes varying wave lengths from high-frequency gamma waves to low frequency radio waves. The alternating 60HZ current (Europe is 50HZ) that is common to our electrical system from power lines to appliances causes both magnetic and electric fields of extremely low frequency. Both fields drop off with distance. Electric fields are easily blocked off by solid materials, while magnetic fields penetrate substances including human tissues.

In my opinion, it is imperative to have the house tested, thus identifying all the hot spots, and most of all to become aware and learn the rules. Distance from the television is 10', reduce-eliminate all electric blankets, heated waterbeds, electric clocks, etc.

RADON GAS
Radon is a radioactive gas that is colourless, odourless and tasteless. It derives from the material breakdown of uranium in soil, rock and water. Radon also breaks down to form additional radioactive particles called "progeny".

We find radon gas in homes as it escapes from the ground to the enclosed spaces. Usually basements are the most affected as they are enclosed and are close to the ground. Most homes surveyed have shown "low-levels" of radon. A small and significant minority of homes in many cities had "high-levels".

The risk known to our health associated with exposure to radon is an increased risk of developing lung cancer, especially if combined with smoking. Studies show that radon is responsible for possibly 10% or more of all lung cancers.

Once radon gas and progeny are breathed through the air, they break down into "alpha-particles", as these release small bursts of energy and are absorbed by the lung tissues, initiating lung cell death.

The Ministry of Health Canada reviewed and approved a safety guideline in 1993. Remedial measures are to be taken at levels of radon exceeding 800 BQ/m3 as the average annual concentration in living quarters. Also because there is some risk at any level of radon exposure, it is advisable to reduce levels of radon as low as possibly practical.

There are several methods for measuring radon levels. As these levels may fluctuate throughout periods of time, it is advisable to do a "comprehensive" diagnosis prior to embarking on a final radon-remedial plan. After this plan has been implemented, it is important to do a follow-up diagnosis.

The process of lowering the radon levels is complex, and some of the common steps usually taken are:
 Sealing or closing off of major entry routes like open sumps, floor drains, voids-lesions in the floor/walls
 Reducing negative pressure in the home
 Depressurizing soil around the foundations
 Increased mechanical ventilation with HRV
 Fresh combustion air supply
 Fresh air to return-air-duct