The initial known report that tobacco might be connected to cancer was in 1898 when Hermann Rottmann proposed that tobacco dust might be causing elevated rates of lung cancer in German tobacco workers.[20] In 1900, it had been demonstrated that tobacco juice caused cancer in animals.[20] In 1912, Isaac http://frankgrcm792blog.suomiblog.com/how-cbd-tincture-hemp-oil-extract-can-save-you-time-stress-and-money-11970198