A new study published in The Lancet, a British medical journal, puts Australia and New Zealand at the top of the list for the global consumption of weed. That’s not an easy title to win either as there’s some really good competition out there. The data also showed that pot is the world’s favorite substance of choice. Yet, despite its popularity and widespread use, it also caused the least amount of harm, since you can’t OD on weed, no matter how many pounds you smoke.