When I was a kid, I was fascinated with tree rings. I used to love counting the rings so I could tell how old a tree was. But tree ring science is far more than just child's play. As politicians try to implement the Kyoto Accord, information about climate change is in high demand. Because trees add a growth ring every year, the tree is like a thermometer with a very long memory. Dendrochronology—the science of tree ring dating, uses tree rings to look into the past and predict the future. A new geography professor at Carleton University explains that the science of tree ring dating can be used to predict climate change and much more. Here is Joel Bernbaum with the documentary...
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Dendrochronology and me [9:03]