In 1973 Nepal had 34000 marijuana farmers and the cultivation was worth $6.5 million per this 1974 Cableleaks. It was banned amidst US War on Drugs. What would be the economic value of this in today's world where the marijuana Industry is worth $250 Billion and headed towards $1 Trillion by 2030? By seeing this figure Nepal has already lost a lot in economic opportunities in its marijuana industry that could have made a developing country already a developed country.
Another Fact: Nepal confiscated and destroyed $1.5 Billion worth of plant, products between Jan 2018 through Sep 2019 despite the ban.