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North America’s oldest boreal trees are more efficient water users due to increased [CO2], but do not grow faster. 2019. Giguère-Croteau, C.; Boucher, É.; Bergeron, Y.; Girardin, M.P.; Drobyshev, I.; Silva, L.C.R.; Hélie, J.-F.; Garneau, M. PNAS 116(7): 2749-2754.

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