I did want to add, I thought you were referring to the old studies, I didn't realize you were referring to this new one.
The new study still has to explain why the epidemiologists and pulmanologists just released a series of large studies that showed that cannabis had the effect of reducing lung cancers.
Here's an example of the older articles -
http://news.bbc.co.uk/1/hi/health/141891.stm
these kinds of claims have been contradicted by several large studies, one released in 2006, the other in 2007.
http://www.sciam.com/article.cfm?cha...7F0000&ref=rss
http://www.cbsnews.com/stories/2007/...n2696726.shtml
This new study will get peer reviewed and repeated - I'm sure the governments will fund repeat tests - so we'll see if they come up with an explanation for the different results.
This new NZ study was done with roughly 300 people, the studies above are described as large, one was done with about 2500 people, the other I thought was even more.