Zawya: Climate change, high population density and overexploitation of groundwater resources has lead to massive saltwater intrusion in the greater Beirut area, a leading hydrogeologist said on Thursday. “Seawater intrusion will be aggravated by climate change and exacerbated by us,” Dr. Mark Saadeh, said at the American University of Beirut. Saadeh, a lecturer at the University Saint-Espirit de Kaslik and consultant for the Litani River Authority, was speaking as part of a series on climate change …