Tripoli is the de jure capital city and the largest city of Libya. Tripoli, with its metropolitan area, has a population of about 1.1 million people. The city is located in the northwestern part of Libya on the edge of the desert, on a point of rocky land projecting into the Mediterranean and forming a bay.
Within Libya as many as five different climatic zones have been recognized, but the dominant climatic influences are Mediterranean and Saharan.
Deficiency in rainfall is reflected in an absence of permanent rivers or streams, and the approximately twenty perennial lakes are brackish or salty.