Geneva 15.7%. Of the agricultural land, 0.3% is used for growing crops. Of the water in the municipality, 0.2% is composed of lakes and 2.9% is rivers and streams. The altitude of Geneva is , and corresponds to the altitude of the largest of the Pierres du Niton, two large rocks emerging from the lake which date from the last ice age. This rock was chosen by General Guillaume Henri Dufour as the reference point for surveying in Switzerland. The second main river of Geneva is the Arve, which flows into the Rhône just west of the city centre. Mont Blanc
History of Geneva strong faction within the city. The bishop still tried to exercise his jurisdiction over Geneva and on October 24, 1533 wrote a letter to the council, demanding it to stop Protestant preaching in Geneva, which the council refused to do. Following the bishop's flight, the influence of Protestant preachers in Geneva increased, and this was achieved to the chagrin of the local Catholic priests due to pressure from Bern, which threatened to revoke the 1526 alliance treaty unless freedom was granted to Protestants. In addition, the exiled bishop was gradually losing popularity also with the Catholic sections of Genevan society