Authors:

As a people, we have the problem of making our forests outlast this generation, or iron outlast this century, and our coal the next; not merely as a matter of convenience or comfort, but as a matter of stern necessity.

As a people, we have the problem of making our forests outlast this generation, or iron outlast this century, and our coal the next; not merely as a matter of convenience or comfort, but as a matter of stern necessity.