A high population concentration in the low-elevation coastal zone (defined as less than 10 meters elevation) increases a country’s vulnerability to sea-level rise and other coastal hazards such as storm surges. Violation of bathing quality standards poses health risks for the population as well economic risks to the tourism sector. The indicator also provides information on the effectiveness of environmental regulation, especially with regard to wastewater and marine pollution caused by ships. Stocks that are “Overexploited”, “Depleted” and “Recovering” are outside their maximum biological productivity.