AFP: UN climate chief Christiana Figueres urged the air transport industry on Thursday to press on with curbs on emissions, underlining that it held “critical keys” to tackling global warming. Aviation produces an estimated two percent of global emissions from human activity which “if left unchecked, will have further impacts on climate change,” Figueres told an industry conference on aviation and the environment. “The world will continue to need a stong aviation industry but the …