km. Climate: Predominantly Mediterranean, alpine in the north, hot and dry in the south. Extreme points: The deepest point: Mediterranean Sea 0 m. Highest point: Mont Blanc (Monte Bianco) de Courmayeur 4,748 m (a secondary peak is Mont Blanc). Population: 57,998,353 (July 2003 estimate). Age structure: Between 0 and 14 years: 14%