Agence France-Presse: War, hunger, poverty and sickness will stalk humanity if the world fails to tackle climate change, a 12-day UN conference on global warming heard on Monday. A volley of grim warnings sounded out at the start of the marathon talks, a step to a new worldwide treaty to reduce greenhouse gases and help countries exposed to the wrath of an altered climate. Polish Environment Minister Maciej Nowicki, elected to chair the December 1-12 meeting in the city of Poznan, opened the …