Danube Delta in danger - say activists Romanian environmentalists are stepping up their efforts to protect the Danube Delta reserve. It is the largest European wetland and reed bed, with unique flora and fauna and its lakes, channels, marshes and streams cover up to 5,500 square kilometres. The main danger for the World Heritage area is use of the land by the nine countries bordering the river; agricultural projects which lead to water pollution, overfishing and poaching . More about: Environmental protection, Romania