In today's episode, nurses turn their backs on the Health Minister, hundreds of Dunedin residents have lost power after vegetation hit a powerline as a severe weather front moves up the South Island, Environment Canterbury (ECan) is considering whether to declare a "nitrate emergency" at its final meeting Wednesday, as dozens of protesters gather outside the building demanding action, and scientific theories about black holes published by a New Zealand scientist in 1963, have been reinforced in new international research.