The NEPA Citizens guide is for citizens to effectively participate in the review of environmental effects in Federal decision making.

Tree topping is a drastic pruning practice used to reduce the height of a tree. Learn steps to mitigate the effects of poor pruning or damage to the top of the tree.

The Environmental Purchasing Newsletter provides green purchasing guidance, best practices, case studies, and training opportunities.

The Forest Service guide to Road Closures and Obliteration outlines procedures and techniques for closing existing roads on Forest Service lands.

Watch a video in which dry stone mason Mark Jurus explains the techniques and features of a well-constructed dry laid stone wall.

This directory provides a listing of NPS Arborists organized by state.

The Technical Preservation Services (TPS) office of the National Park Service is responsible for historic preservation policy and guidance.

Dusting stone objects and architectural features will better preserve and protect cultural resources for the enjoyment of current and future visitors.

2014 Fire & Life Safety Deficiencies Identified in Buildings that House Cultural Resources- pdf