In the late 70's early 80's, collective lifestyle, including cooperative production, became very popular in Denmark. Some of the intentional communities that emerged from that era, still exist, such as the Svanholm community, started in 1978. Freetown Christiania was established in 1971, when a group of young hippies occupied abandoned military grounds in Copenhagen, and several collectives also emerged from the Danish fraction of the squatting movement ("BZ" in Danish) of the 80's. People living in these communities often practice environmental consciousness, and some have joined the Danish Ecovillage Network.