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by ridgeguy 3378 days ago
Out of my field, so can't offer an explanation, but it appears smoking MJ is not associated with lung cancer or reduced forced vital capacity (a measure of respiratory capability).

Here's a recent (2016) review: [1] Nature, apparently not paywalled. Lung cancer is the topic in the paragraph immediately before the "Discussion" section.

[1] http://www.nature.com/articles/npjpcrm201671