Agence France-Presse: British Foreign Secretary David Miliband unveiled an interactive map Thursday demonstrating the impact of global warming in decades to come, to underline the looming threat. The map, presented at London’s Science Museum, shows graphically how climate change could lead to water and food shortages, mass migration and conflict if action is not taken at a landmark summit in Copenhagen in December. “The reason for publishing this map is that for many people, not only in our own …