Zane Grey 
Young Forester 

Excerpt: "[Lumbermen] are in such a hurry to get rich that they’ll leave their grandchildren a desert. They cut and slash in every direction, and then fires come and the country is ruined. Our rivers depend upon the forests for water. The trees draw the rain; the leaves break it up and let it fall in mists and drippings; it seeps into the ground, and is held by roots. If the trees are destroyed the rain rushes off on the surface and floods the rivers. The forests store up water, and they do good in other ways."