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
Being on your phone
Phones aren't chemicals, so they're not on the official Prop 65 list, but the California Department of Health still warns that the radio frequency energy they emit might cause cancer.
Scientific studies haven't demonstrated that cellphone radiation levels are anything to worry about in humans, though researchers have noticed some worrisome tumor growth and heart-tissue damage in rats who were exposed to cellphone radio frequency radiation, Science Friday recently repor
Parking your car in an indoor, enclosed parking deck
A concrete parking lot is not the best place for a casual, cancer-risk-free hang.
"Breathing the air in this parking garage can expose you to chemicals including carbon monoxide and gasoline or diesel engine exhaust," California says on its parking-lot warning. "Do not stay in this area longer than necessary."
The state insists that phrase is printed on signs in indoor parking decks or just about anywhere that people park inside.
In California, it seems you're never far from a reminder about cancer.
You can't park a car indoors in the Golden State without seeing a warning about the ways your cancer risk might spike.
Earlier this year, a California judge ordered that all coffee sellers in the state must post warnings about the potentially cancer-causing effects of a chemical in coffee called acrylamide. But the ruling is being challenged by the state's Office of Environmental Health Hazard Assessment because the