The brutal war in Darfur has set off what the United Nations has called the “world’s worst humanitarian crisis,” a crucible of death that seems to grow grimmer despite a new peace agreement. But it is not bullets that kill most people here now. It is pneumonia borne on desert dust, diarrhea caused by dirty water, and malaria carried by mosquitoes to straw huts with no nets, reports The New York Times. At least 200,000 and perhaps as many as 450,000 have died as a direct result of the conflict in Darfur, according to estimates by international health and human rights organizations, though no one is sure how many of the deaths have come from combat and how many from the hunger and disease that have been caused or worsened by the war. Local and international aid organizations here are trying to stave off these deaths, but their ranks are shrinking. They take care of 2.5 million people driven from their homes and farms with a diminishing pool of money as donors, particularly in Europe, Asia and the Middle East, have not sent all the money they pledged to Darfur. Beyond that, they work under tight restrictions imposed by Sudanese officials and face attacks by combatants who hijack their vehicles and menace their workers. The peace agreement seeks to end the war in Darfur, in which rebels seeking autonomy and wealth for this impoverished region have fought against the government and its allied Arab militias. But the accord will not end the catastrophe here anytime soon.