Spiegel: Recent research shows that melting icebergs in the ocean around Antarctica may actually slow global warming. The iron particles they carry feed algae blooms that suck up CO2. Could man-made algae blooms in the frigid waters help combat climate change? The catch was cold and lifeless, there wasn’t a single fish flopping in the net. When the haul came to rest on the deck of the HMS Endurance in southern Atlantic off the coast of Antarctica, the only sound was a dull creak. Then …