By Rand Paul
Obama acts as though we no longer have a Constitution
Smoking a joint once a week or a bit more apparently doesn't harm the lungs, suggests a 20-year study that bolsters evidence that marijuana doesn't do the kind of damage tobacco does.
Study co-author Dr. Stefan Kertesz said there are other aspects of marijuana that may help explain the results.
But the common lung function tests used in the study require the same kind of deep breathing that marijuana smokers are used to, so their good test results might partly reflect lots of practice, said Kertesz, a drug abuse researcher and preventive medicine specialist at the Alabama university.
