III. THE MINERAL RESOURCES OF THE UNITED STATES.
The natural resources of any country may be divided into two broad groups, which call for different treatment and give rise to very different problems. There are, on the one hand, resources which are exhaustible but which can be restored again; and on the other, resources which, once exhausted, can never be replaced again by human agency. Under the first head come the soil, the forests, the fisheries, and even the water power, for all of these can be made to yield steady returns to man for thousands of years, if used intelligently. Under the second head belong coal, petroleum, natural gas, and all the minerals; man may discover substitutes, he may economize in the use of these substances, but he can never augment their supply. In the previous section we considered some of the problems that arise in the use of the soil in agriculture, and those connected with our forests and fisheries. For the most part they had to do with the intelligent use of these agencies and the restoration or repair of the elements destroyed. In this section we are met by a very different
problem, namely, the conservation of a limited supply of resources and their most economical application to the needs of mankind.
We can distinguish two contrasting answers to this problem, one careless and optimistic, and the other pessimistic and fearful of the future. According to the former point of view we should not borrow trouble of the future; man’s career has been one of constant progress; when he has been confronted with a difficulty he has invariably met it. Indeed necessity has been the most prolific mother of invention. If our coal supplies are exhausted, man will devise means of utilizing the heat of the sun, the force of the tides, the motion of the waves, the stores of electrical energy in the air, all of which will yield inexhaustible supplies of heat and energy. If our stores of iron should fail, some enterprising inventor would surely discover a practicable and commercially profitable method of extracting aluminum from clay. New sources of raw materials will undoubtedly be discovered before the old ones give out, and we may confidently expect that, while the material bases of a high civilization may shift somewhat, they will never crumble and fall.
The other school has sounded a louder note of alarm. At the present rate of consumption the coal and iron deposits of Europe and America must soon be exhausted. The supplies of copper, lead, and other metals in favorable locations are also being consumed at an alarming rate, and no other known supplies are in sight. Within the past century scientific knowledge and engineering skill have combined to unlock the storehouses of the geologic ages, and now like prodigals we are dissipating our fortunes. To treat these exhaustible sources of supply as permanent sources of income, without regard for the future, is based upon unsound theory and must lead to reckless practice.
As so often in opposing counsels, there is an element of truth in each of these contrasting points of view. But the safer plan is not to wait until we have exhausted our natural resources before remedying the evil, but to heed the warnings now. A long step in this direction was taken in May, 1908, when a conference of the governors of all the states, together with college and railroad presidents, business men and others, was held at the White House upon invitation of President Roosevelt. As a result of this gathering a National Conservation Commission was appointed, which will make an exhaustive investigation into the amount and rate of consumption of the natural resources of the country and suggest measures for their better utilization and preservation through national, state, and local action. In line with this movement two other commissions have been established, one on inland waterways and one on country life. As a result of the national awakening we may expect to see a more rational use made of the gifts of nature, and a better organization of our national life. Heretofore the ideal of our business men has been to exploit, one might almost say pillage, the stores of nature as rapidly as possible; it was a pioneer stage of industry, inevitable but wasteful. From now on the new conception must be the restoration where possible of exhausted elements, as of the soil and the forests, and the careful use of the non-renewable stores of wealth so that at least we shall not make them engines of destruction, as in the case of floods and devastation occasioned by careless hydraulic mining in the West. Let us now turn to a more detailed consideration of the separate items in our inventory of national wealth.
Our modern civilization may be said to rest upon coal, for upon its possession depends man’s ability to utilize most of the other items of his wealth. Passing over its utility as a fuel to heat our houses, without coal it would be impossible to smelt the iron needed in all our industries,
to drive the machinery, to run our locomotives or steamboats, or in a word to carry on the manifold activities of our industrial life. According to the United States Geological Survey there are 335,000 square miles of coal-bearing strata in this country, but the larger part of it is too thin or impure to be useful for industrial purposes; it serves in many localities however as domestic fuel, as in the case of the lignite deposits of the Northwest. An estimate of Professor Tarr places the coal-producing area in the United States at not over 50,000 square miles. At the present rate of consumption—over 350,000,000 tons in 1905—it has been estimated that the anthracite coal deposits will last for only fifty years longer, while we have only enough bituminous coal for one hundred years.
The large deposits of coal in England and their early development gave that country a great advantage over Europe. But as long ago as 1861 Professor Jevons, a noted English economist, sounded a note of alarm: he prophesied that because of the superior size and character of the coal deposits of America, industrial supremacy must inevitably pass to this country. His prediction has already been verified in the case of coal and iron production, and will probably soon prove true of textiles also. The coal deposits of the United States are thirty-seven times as great as those of England, but at the present rate of mining are threatened with exhaustion at no distant date. It has been estimated that there are in China coal deposits capable of supplying the world with fuel for another thousand years. But such estimates are, in the present state of our knowledge about China, the merest guesses, and if true would seem to point rather to the future industrial supremacy of that country in the world’s markets.
Two-thirds of the coal mined in the United States is obtained from the Appalachian field, extending from New York to Alabama, Pennsylvania being the largest coal-producing state in the Union. In the iron and steel industries