SciDevNet: Disagreement between scientists over whether Central and South America are about to be hit by a major El Nio event are delaying vital preparations, the region's weather organisations warn. South American scientists are still quibbling over whether an El Nio event is building. The uncertainty is impacting officials and states, who must act soon to prevent the worst scenarios, including deaths from natural disasters, meteorological organisations say. Eduardo Zambrano, a researcher at the International...