|Marijuana plant, and distinctive leaves.|
Check this government page out: http://www.drugabuse.gov/
This government report tries to use unbiased, neutral language to portray an apparent disdain for marijuana usage. They do this by incorrectly paraphrasing sources to make it seem like the studies found issue with smoking marijuana, when in fact many studies have not. The author of this page then ignores the sources and neglects to quote them when the findings are in favor of marijuana usage.
Even the references to "marijuana usage" is often replaced with "marijuana abuse," as if anything you use frequently is an abuse. Read this quote from the page.
"It is also smoked in blunts, which are cigars that have been emptied of tobacco and refilled with a mixture of marijuana and tobacco. This mode of delivery combines marijuana's active ingredients with nicotine and other harmful chemicals."