[1/2]A man walks at a medical waste recycling plant which has been recently hit by Saudi-led air strikes on the outskirts of Sanaa, Yemen November 16, 2016. REUTERS/Mohamed al-Sayaghi Acquire Licensing Rights GENEVA (Reuters) - The formation of a new government by Yemen's armed Houthi movement and its political allies will hinder peace efforts in the country, the U.N. special envoy to Yemen said o