THE FOLLOWING MAP SHOWS HOW MARINE DEAD ZONES ARE GLOBALLY DISTRIBUTED. MOREOVER, THE BAR CHART SHOWS THE DRAMATICALLY INCREASING NUMBER OF DEAD ZONES FROM THE BEGINNING OF THE PAST CENTURY TO THE PRESENT DAYS.

AS YOU CAN SEE, THE LARGEST AMOUNT OF DEAD ZONES IS CONCENTRATED AROUND INDUSTRIAL AND RICH COUNTRIES SUCH AS THE USA, EUROPE AND JAPAN WHERE POLLUTION LEVELS ARE VERY HIGH AND FISHING IS BROUGHT TO AN EXCESSIVE EXTENT.