Guardian: In its annual flagship report on the state of the world, the UN said unsustainable patterns of consumption and production posed the biggest challenge to the anti-poverty drive. “For human development to become truly sustainable, the close link between economic growth and greenhouse gas emissions needs to be severed,” the UN said in its annual human development report (HDR). Celebrating its 20th anniversary, the HDR said the past two decades had seen “substantial progress” in human development despite…