Over the past 25 years, there has been a dramatic increase in the acquisition of conservation easements by nonprofit organizations. Privately held conservation easements, i.e., those held by nonprofits rather than governmental entities, have thus emerged as an important and growing tool for the preservation of natural and scenic features of the United States landscape.
Korngold, Gerald, "Private Conservation Easements: A Record of Achievements and the Challenges Ahead" (2009). Other Publications. 426.