Economy Should India legalise marijuana? Making it legal can do more good than harm Updated : September 19, 2019 01:19 PM IST The total worldwide cannabis market – that includes both the illegal and the legal parts of it – is estimated at $344 billion. The change in rules may help farmers in certain regions to grow a much-in-demand cash crop. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.