For the residents of Maaden, a green oasis nestled in the depths of the vast Mauritanian desert, communal living, spirituality and sustainable agriculture are the keys to a harmonious existence. For the residents of Maaden, a green oasis nestled in the depths of the vast Mauritanian desert, communal living, spirituality and sustainable agriculture are the keys to a harmonious existence. Environment Phys.org – latest science and technology news stories