Читать книгу Practical Forestry in the Pacific Northwest - E. T. Allen - Страница 31

It is evident, from the history of older countries, that it does. While consumption per capita will undoubtedly decrease, population is growing. Substitution will be necessary, but will not supplant wood for a multitude of purposes. Much has been said about the use of steel, concrete and like materials in building. The building trades only use 60 per cent of our lumber today, without considering fuel. It is unlikely that the reduction of this percentage will very much more than offset the growth in volume of the reduced percentage due to increased population. Fifty years ago there was scarcely a lumber user west of the Mississippi river. We know the settlements, mines, railroads and cities that have developed since to use lumber. It is a poor Westerner who doubts that the next fifty years will see a far greater development. And the Panama Canal is coming, with the certain result of making our fast-producing forests able to compete successfully with Eastern and European forest crops grown with less natural advantage.

Moreover, we now use three and a half times as much wood a year as our forests produce. Consequently the demand might even fall off three and a half times and still consume the product. And the forest producing area diminishes constantly. Little as we now consider the possibilities of food famine, history shows that nations rapidly increase to the limit of their agricultural production or beyond, and we must reckon not only on our own increase but also upon immigration from, and export to, nations whose pressure upon their production exceeds ours. It is certain that land now considered too remote, rough and poor for agriculture will be put to that use. We know that other countries do not to any considerable extent devote land to forest that will grow food crops at all well.