ut the plan to build solar and wind farms in Namibia's Tsau ǁKhaeb National Park, which means "Soft Sands" in the Nama language, is not supported by conservationists. The 26,000 sq km (10,000 sq mile) park was established in 2004 out of what was known as the "Sperrgebiet" - German for "Restricted Area" - a vast swathe of land