WASHINGTON (AP) — The administration of President Barack Obama is vowing to press ahead with efforts to curtail greenhouse gas emissions after a divided Supreme Court put his signature plan to address climate change on hold until after legal challenges are resolved. The administration's plan aims to stave off the worst predicted impacts of climate change by reducing carbon dioxide emissions at existing power plants by about one-third by 2030. "A stay that delays all of the rule's deadlines would postpone reductions in greenhouse gas emissions and thus contribute to the problem of global climate change even if the rule is ultimately sustained," U.S.