UNITED NATIONS (AP) — The presidents of China and Iran are among world leaders addressing a United Nations summit Saturday after the gathering unanimously approved an ambitious blueprint to tackle more than a dozen major global issues.Goals of the 15-year road map endorsed Friday by the U.N's 193 members include eradicating extreme poverty and fighting climate change.The new goals are expected to cost between $3.5 trillion and $5 trillion every year until 2030.