I walked into my office this morning and happened to glance at the building's Prop 65 warning. "This building contains one or more chemicals known to the State of California to cause cancer, birth defects, or reproductive harm." I realized I pay zero attention to those ubiquitous signs.

This warning is on almost every public and apartment building in California because not posting it can result in expensive lawsuits if chemicals are found in miniscule amounts. http://oag.ca.gov/prop65/faq#public