sentences:  As of 2011, there are
  
  The northern part of the country which has the Sahara desert and which borders Libya and the volcanic massif of Tibesti () forms part of the northern zone.Vegetation is dominantly tropical in the tropical zone of the country with deserts having least vegetative growth.However, a large area of desert dunes lie between Lake Chad and the Ouaddai massif, where fringes of xerophytic scrubland is noted.