More than 70 years after the end of World War II, countless pieces of ammunition are still lying in all oceans. Once the casings are damaged, the explosives can release toxic substances into the seawater. A new review study, published by scientists from the GEOMAR Helmholtz Centre for Ocean Research Kiel and the Schleswig-Holstein Ministry of the Environment, points to considerable knowledge gaps regarding the spread and effects of these chemicals on marine ecosystems.