World leaders and international aid agencies have warned that a humanitarian catastrophe is looming in Gaza. Even before Israel launched its ground offensive, a million of the enclave’s one and a half million people relied on aid handouts to survive. Border crossings were closed, with only a handful of aid shipments allowed in. Unemployment in Gaza is at 40 percent, those who have work exist on less than two euros a day.The United Nations is the only agency still working in Gaza. It says food supplies are at critically low levels, and hospitals and medical services are struggling to cope with the wounded. Israel has denied any humanitarian crisis in Gaza. The UN begs to differ.