After the state settled its lawsuit with 3M in 2018, the AG made public thousands of internal 3M documents. We decided to read them all. They show 3M ignored, delayed, minimized and obscured research that raised red flags about the chemicals for decades: https://minnesotareformer.com/2022/12/15/toxic-3m-knew-its-chemicals-were-harmful-decades-ago-but-didnt-tell-the-public-government/