By Manjunath Kiran / AFP The world needs to set aside an area bigger than the United States for tree planting and other measures to meet climate pledges, according to research published Tuesday that warned against “unrealistic” carbon-cutting plans. The world needs to set aside an area bigger than the United States for tree planting and other measures to meet climate pledges, according to research published Tuesday that warned against “unrealistic” carbon-cutting plans. Almost 200 nations will begin high-stakes UN climate talks in Egypt from November 6, as increasing damage from floods, heat w…