Apichat @apichat CC BY-SA 27/01/2017 2 2 But how do trees keep track of this #information?▻http://climate.nasa.gov/news/2540/tree-rings-provide-snapshots-of-earths-past-climate http://climate.nasa.gov/internal_resources/1062#.jpg #Arbre #Arbres Apichat @apichat CC BY-SA