Due to their worldwide distribution, trees have an extraordinary role in removing excessive amounts of CO2 released by our highly industrialized and mobile modern societies from the atmosphere. So far however, no tool exists which would enable scientists to precisely calculate the carbon dioxide uptake of trees over their whole lifetime. Using a decade-long sequence of annual growth rings from pine trees, scientists at the Nuclear Magnetic Resonance Laboratory, NMR for Life, at Umeå University’s Chemical Biological Centre, (KBC) have introduced a highly advanced technique for tracking the carbon metabolism of plants and its environmental controls. This technique lays the foundation for much improved parameterizations of climate change and global vegetation models, which will tell what the future holds in store.