Going to your dentist's office
Getting your teeth worked on can be risky, according to California's warning system. Some chemicals on the state's list are used in common dental procedures.
"These include sedation with nitrous oxide; some root canals, crown placements or removals, dental bridge placements; tooth restorations with fillings that contain mercury; and the use of some dental appliances," California's warning says.
Having a bite to eat in a restaurant
Going out to eat is not a cancer-risk-free activity either, according to California.
Any place that serves fries, alcohol, or some balsamic vinegars that may contain lead must also serve up this warning to customers: "Certain foods and beverages sold or served here can expose you to chemicals including acrylamide in many fried or baked foods, and mercury in fish, which are known to the State of California to cause cancer and birth defects or other reproductive harm."
Acrylamide, the chemical that California's worried about in coffee, is found in some foods cooked at high temperatures. But again, the Food and Drug Administration says the levels of the chemical in foods like fries or crackers are much lower than the levels linked to cancer in animal studies.
The state suggests residents also limit their consumption of grilled foods, since those cooking processes can also contribute to an increased cancer risk.
Enjoying a day at an amusement park
Amusement parks aren't all fun and games, according to Prop 65 (
California cautions that exhaust from rides, lead in railings, secondhand smoke from fellow parkgoers, and greasy food could all raise cancer risk.
It's true that the chemicals in those things have been found to be linked with higher rates of cancer, but you'll find all of them outside amusement parks too.
Though some of California's cancer warnings seem silly, others are very sound.
Scientists have known for years that the more alcohol you drink, the higher your risk may be of developing cancer in the throat, liver, breast, or colon.
Cancer doctors in the US say even as little as one glass a day of an alcoholic drink can contribute to your risk of developing cancer.