Ultraviolet Radiation

The earth's ozone layer is not as thick as it used to be and more ultraviolet radiation from the sun reaches us. Exposure to ultraviolet radiation, often referred to as “UV rays,” can cause skin cancer and other serious health problems. Fortunately, there are simple guidelines to follow to protect against damage from the sun's harmful rays.

Ultraviolet radiation (UV) is a type of invisible light sent out by the sun and by certain kinds of lamps. By now, most people have heard that exposure to ultraviolet radiation can cause skin cancer. It has also been linked to a number of other health problems, including sunburns, cataracts, premature aging of the skin, and weakening of the immune system.

For centuries, the earth's ozone layer protected people from the sun's harmful rays. However, over time, the release of certain chemicals into the environment has damaged the ozone layer. It is thinner than it used to be, so more ultraviolet radiation is getting through to the earth's surface.

Many countries around the world, including Canada, have recognized this problem and have taken steps to protect the ozone layer from further damage. Efforts have focused mainly on controlling the production and use of chemicals that are known to damage the ozone layer.

When grouped together, these chemicals are called ODCs, which stands for “ozone-depleting chemicals.” These kinds of chemicals are mainly used in refrigeration and air-conditioning.

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