Half the world’s glaciers will disappear within a single lifetime. Breaking science with Dr. David Rounce. Netherlands researcher Leon Simons: geoengineering has been cooling the planet for decades. That is over now. Co-author of the new bombshell from James Hansen tackles more warming revealed. Hansen predicts sea level rise much higher than thought and up to 10 degrees C hotter. If true, catastrophe is on the near horizon.