FOEN, The CO2 Effects of the Swiss Forestry and Timber Industry, p. 17, chap. 1.1 ([Internet, 2021-03-08](https://www.bafu.admin.ch/dam/bafu/en/dokumente/wald-holz/uw-umwelt-wissen/co2-effekte_der_schweizerwald-undholzwirtschaft.pdf.download.pdf/the_co2_effects_oftheswissforestryandtimberindustry.pdf))