Warning signs

In November 2014, the city of Berkeley, Calif., announced it may place warning stickers on local gas pumps to highlight the link between gasoline and climate change.

3: Phases of regulations introduced since 1989 governing the use of warning labels on Canadian cigarette packs. In 2011, new rules required 75% of the front and back of packaging to be covered by cautionary images.

18: Minimum age to use a tanning bed, as directed by labels required on indoor tanning equipment in Canada. Stickers — mandatory as of 2014 — warn of cancer and other health risks.

19: Number of confirmed cases of toxic shock syndrome reported in Canada between 1975 and 1980, when Health and Welfare Canada first required tampon manufacturers to include warning labels.

128: Number of an Ontario legislative bill introduced unsuccessfully in 2010 requiring cellphones to carry a sticker warning that "users, especially children, should keep this device away from the head and body."

180: Maximum allowable milligrams of caffeine per single serving of "energy drink," under 2011 Canadian rules. The Health Canada regulation also required labels that indicate the drink isn’t appropriate for children or pregnant or breastfeeding women.

185: Number of "entertainment products" assessed in 1994 to satisfy new federal rules requiring electronic games makers to warn Canadian consumers of content including "comic mischief," sexual innuendo and graphic violence.

1991: Year the Yukon government introduced labelling on all wine and liquor bottles informing residents of the dangers of fetal alcohol syndrome for pregnant women. Northwest Territories would later join Yukon in labelling alcohol.