Environmental Protection

CATASTROPHE ALERT! What Is To Be Done Against the Willful Destruction of the Unity of Humanity and Nature

The Amazing Story of a Small Blue Planet

A Scurry of Squirrels

Undermined in Coal Country

Simple Things Won't Save the Earth

Betting the Farm on a Drought

Everglades Betrayal

Freckles from the Marvelous Forest

Little Book of Green Tips

The Story of my Boyhood and Youth

The Water Wizard – The Extraordinary Properties of Natural Water

Wild and Wonderful

Regeneration

The Black Poplar

Down from the Mountain

In Brightest Africa

Hold Your Water

A Thousand-Mile Walk to the Gulf (With Original Drawings & Photographs)

Good hunting; in pursuit of big game in the West

Practical Forestry in the Pacific Northwest