New Yorkers consume the most cannabis in the world, at least 62.3 tons.

The researchers looked at countries with the highest and lowest marijuana use, including those where marijuana is partially or fully legal. They compiled a list of 140 cities to compare cannabis prices in different regions. The most expensive cannabis is sold in Tokyo - $33.8 per gram, and the cheapest - $5.9 - in Montreal. The cheapest illegal drug, at around $6 per gram, is found in Bangalore, India. New York is the largest city in the world in terms of cannabis consumption: 62.3 tons per year. The least consumed in the Canadian Annapolis and the American Denver.