War-torn Yemen faces an “extremely troubling outlook” after a serious escalation between Iran-backed Houthi rebels and Saudi Arabia, the head of the United Nations Development Programme warned on Sunday. Achim Steiner, the UNDP’s administrator, also told AFP the impoverished country is at risk of being “forgotten” as Russia’s war on Ukraine grabs the world’s attention. “It is an extremely troubling outlook at the moment for the people of Yemen,” Steiner said in an interview at the Doha Forum, when asked about the latest surge in hostilities. “The reality is that desperation, poverty, destructi…