Cathedral Grove: The old yet enchanting Douglas fir trees of 800 years old are the cynosures of MacMillan Provincial Park. (thewesterlyhotel.ca)
In the 1980s forest biologists started to report striking increases in the growth rates of trees and the density of forests: in Douglas firs in British Columbia, Scots pines in Finland, bristlecone pines in Colorado and even tropical rain forests. (rationaloptimist.com)
A Canadian company has planted entire forests of fir trees that started life in tissue culture. (science.sciencemag.org)