MARIJUANA CANNABIS MARIHUANA MEDICAL LEGALIZE WEED 420 OBAMA RON PAUL JACKSON DOPE GRASS BONG RIP JOINT KUSH DRUGS SEEDS WAR NWO NEWS VAPORIZER BOWL HASHISH BLUNTS H1N1 Flu HASH GANJA HEMP SEX Another important classification for vaporizers includes the type of materials used in the heating element, the extraction chambers, and delivery means