Keep in mind that radiation does not only come from radioactive substances (such as Cobalt). We live in a smog of radiation due to cosmic rays from outer space and intense radiation from solar activity.

DID YOU KNOW THAT...
- The air we breathe is radioactive due to naturally occurring radioactive elements, such as uranium, thorium, and radium in the rocks, soil, and masonry (like Grand Central's granite walls).

- The house we live in is radio-active -- more so if it's brick or stone than if it is wood.

- Much of the food we consume is radioactive from naturally occurring radioactive forms of carbon, hydrogen, potassium, and radium. Brazil nuts, milk, beer, and whiskey are naturally radioactive.

- The higher the location of a place, the higher it's cosmic radiation.

- People who travel frequently by plane can receive more cosmic radiaiton.

- Watch dials have uranium content, thus, it emits certain amount of radiation.

- Smoke detectors emits radiation.

- In France, people are exposed to as many as 350 millirems a year of background radiation compared with an average of 90 millirems in New York. The average background radiation is approximately 0.01 to 0.02 millirems per hour.

- We can't avoid radiation. We receive an average of 100 millirems ( unit of radiation) of unavoidable background radiation a year from food, water, rocks, and cosmic rays ( as mentioned)