Mera has invested money in causes dear to her heart: a marine fish farming group, a company that looks for cancer treatments in products from the ocean, and a maker of a fingerprinting system for newborns.

FORBES: Rosalia Mera

To some extent, this is already happening: marine and inland farming now account for more than 30% of total fish production, up from around 26% in 1998 and single figures 30 years ago.

ECONOMIST: The tragedy of the commons, contd | The