I responded that climate change is the greatest threat facing Israel. Israeli research indicates Israel and her region already experience global warming. Extreme rainstorms put millions of Israelis at risk from deadly floods. Warming temperatures mean more mosquito-borne illnesses. Severe droughts impact neighboring states and Africa. Droughts mean lack of food and water, leading to refugees and political instability like ISIS. Since Israel produces less than 45 percent of its food, it needs other countries for food — a bad position when facing long term drought.