Single vaping episode of cannabis could yield positive results in urine drug tests Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center Vaping: Get the Facts. Protect Your Future Anne Arundel County Health Department Cannabis smell shifts from full skunk to a hint of citrus : NPR Why Vaping Cannabis Feels So Different (And Sometimes Scarier) Get Canna Card What Does Weed Smell Like? Purpose Get Support Today