Scores of nations are attending the 27th annual COP in the Egyptian resort town of Sharm-el Sheikh. Host Soraya Sarhaddi Nelson explores what the international gathering will deliver and whether climate diplomacy is enough to keep the planet from the point of no return, especially when leaders of some of the biggest polluters skip such summits. Her guests:Andrzej Ancygier, Senior Energy and Climate Policy Analyst with Climate Analytics;Lutz Weischer, Head of Policy, Berlin of Germanwatch e.V.;Luis von Randow, spokesman for Fridays for Future. Produced by Dina Elsayed.