Know your environment
Learn how to reduce your exposure to cancer-causing substances (carcinogens).
Learn about carcinogens in your environment
Take steps to avoid carcinogens or reduce the time you are around them.
Air pollution is a mixture of chemicals, particles and other materials in the air in amounts that could damage the environment or harm the health or comfort of humans, animals and plants. You can be exposed to air pollution outside and inside.
Arsenic is a substance found in rocks and soil that occurs naturally. Some areas of Canada have higher levels of arsenic in drinking water.
Asbestos is a naturally occurring fibrous mineral used in construction and other industries because it is durable and resists high heat. Exposure to asbestos is highest for people who work with it.
Formaldehyde is a chemical found in smoke and exhaust. Most exposure happens at workplaces that work with it, but some people may be exposed in their homes.
Some medical imaging tests and some types of cancer treatment use ionizing radiation. Often the benefits of exposure outweigh the risks.
Radon is a radioactive gas found naturally in the environment. Exposure happens in homes when radon seeps into enclosed spaces.
Researchers are continuously studying to determine if other substances increase cancer risk.