In cooperation with the Berlin districts, the German Wildlife Foundation and the Senate Department for the Environment have been testing measures to upgrade the city's open spaces to make them livable for insects since 2018. The living conditions for wild bees in cities are being improved "by creating flowering meadows, planting flowering shrubs, promoting natural nesting structures and installing artificial nesting aids," Christian Schmid-Egger, head of the "Berlin blüht auf" ("Berlin in bloom") project, explained.