Greenpeace activist Ingrid Boitin (r) and oceans campaigner Thilo Maack take part in a meeting during the handover of a petition in the Federal Ministry of Food and Agriculture in Berlin. Greenpeace activists hand over close to 52,000 signatures of a petition that calls for the protection of the North- and Baltic Sea. The handover follows a summer of action in which activists built stone barriers on the seabed of the marine protected areas at Adlergrund and Fehmarn Belt to protect them from fisheries.