That does make for some interesting math. For instance, there's about four million children born each year, so that gives us an upper bound of about a million

That does make for some interesting math. For instance, there's about four million children born each year, so that gives us an upper bound of about a million joints consumed. The penal system seems to regard about thirty grams as the unit of scale, so the total mass would be 30 Mg. According to their own website, the DEA seems to seize about an average of 400 Mg of marijuana a year. So we now have a lower bound on production (400 Mg) and an upper bound on consumption (30 Mg). Clearly, production has greatly exceeded demand, in violation of basic micro-economics. Thus, the statement there are four children born for every joint smoked is one of the greatest refutations of capitalism you can imagine. Everyone who believes it should be issued a free Che Guevara t-shirt to show their disdain for free market enterprise. Similarly, anyone who supports the war on drugs should preferentially hire jobs candidates wearing Che Guevara t-shirts in order to avoid hiring those pot heads.