What is the reason behind California cancer warning labels? Literally everything seems to be causing cancer. I just bought a few s2s maple boards from a local lumber supplier and each one had a sticker saying it’s known to the State of California to cause cancer. A maple board? There’s no treatment or paint on it. It’s just a milled and poorly planed piece of lumber.
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[Wood dust causes cancer](https://www.cancer.gov/about-cancer/causes-prevention/risk/substances/wood-dust). It turns out lots of things cause cancer. Prop 65 encourages companies to label everything that might cause cancer even when it’s only a danger at elevated, long term exposure levels.
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