&gt; Auer and his team measured lifetime marijuana exposure in a fantastic new unit of measurement they call &quot;marijuana-years.&quot; Essentially, if you smoke pot every day for a year, that equals one marijuana-year of use. Ditto if you smoke every other day for two years, or once a week for seven years.<p>That sounds highly suspect.<p>Interesting study though - the original is linked below for anyone that has access or cares to buy it (bugs me no end that I have to google for the source from articles like this)<p><a href="https:&#x2F;&#x2F;archinte.jamanetwork.com&#x2F;article.aspx?articleid=2484906" rel="nofollow">https:&#x2F;&#x2F;archinte.jamanetwork.com&#x2F;article.aspx?articleid=2484...</a>