Gaza is home for some 2 million human beings and all the untreated sewage finds its way to the aquifer or to the sea. The sea currents are strong and go from south to north, partly because of the Nile river. Only five kilometers north of Gaza are the intake pipes of the the Ashkelon Desalination Plant, which produces 13 percent of Israel's domestic consumer demand. The sewage is fouling the membranes and are potential health problem for Israel, as some virus and metals may be passing through the filters. Roughly one-third of the sewage being dumped into the sea comes from pumping stations in Beach Camp, a refugee camp of 80,000 people. Generators lack the fuel to pump sewage to Gaza City's treatment plant. Israel is not happy with supplying sewage pipes to Gaza, as they may be used to build Kassam rockets that are killing Israelis.