Most homes built before 1960 contain heavily leaded paint[0]. My assertion isn&#x27;t that lead wasn&#x27;t believed to be dangerous, rather that no one saw it as &quot;seriously&quot; dangerous.<p><a href="https:&#x2F;&#x2F;en.m.wikipedia.org&#x2F;wiki&#x2F;Lead-based_paint_in_the_United_States" rel="nofollow">https:&#x2F;&#x2F;en.m.wikipedia.org&#x2F;wiki&#x2F;Lead-based_paint_in_the_Unit...</a>