An international project has produced a ‘chemical atlas’ providing unprecedented insight into the distributions of key elements, isotopes and other substances in the world’s oceans. The atlas, which includes 3D maps and rotating images, provides a wealth of information including the distribution of micronutrients. They are important for the growth of marine phytoplankton and determine how much planet-warming carbon dioxide the ocean can soak up through biology, plus they can indicate areas of lead contamination from cars burning petrol laced with the toxic metal....