In my apt, there's a sign "This facility contains chemicals known to the state of california to cause cancer".

Question by techen: In my apt, there's a sign "This facility contains chemicals known to the state of california to cause cancer".
In my apartment, there's a sign on each building "This facility contains chemicals known to the state of california to cause cancer, and birth defect or other reproductive harm". I asked the office manager. She said that this warning sign is posted in all the apartments in California. Is it true? This sign is regarding "California Proposition 65". Thank

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