President George Bush's promise to plant a billion trees ((ENVIRONMENT, April 30)) sounds impressive. But the mortality of seedlings reduces the total of trees that survive the first few years. And each year older forests are diminished because of fire, insects, disease and harvesting by man. It is not important how many trees are planted, but rather how much forest area is regenerated relative to how much is cut or lost owing to natural causes.
Allan Sugg, Research Assistant
Swedish University of Agricultural Sciences
Having worked as a tree planter in Canada, I would like to put in perspective...