> It is going to be difficult if not impossible to prove what it was This makes me think of the way that the tobacco[1] and petroleum[2] industries knew about

> It is going to be difficult if not impossible to prove what it was This makes me think of the way that the tobacco[1] and petroleum[2] industries knew about the harmful effects of their products long before the causes were removed or the products were phased out. Perhaps there's an incentive problem somewhere if research like that exists and is ignored due to profit motives? [1] - https://www.theguardian.com/news/2005/jun/02/thisweekssciencequestions.cancer https://www.theguardian.com/news/2005/jun/02/thisweeksscienc... [2] - https://www.smokeandfumes.org/documents/document16 https://www.smokeandfumes.org/documents/document16