Faced with the reduced supply of urea, the capitalist market has a solution. The pun Oro - Orina Is lost in translation: Gold - Urine. The cartoon is of a pawnbroker's that previously bought gold items, with a queue of people waiting to sell their piss. Not so far fetched! From @revista
@revista Wait til they learn about the phosphate problem and where they can get it (bones). Espere hasta aprenden del problema de fosfato y adonde se puede lograrlo (huesos).