And conservation is not only the effort to preserve wildlife but also the effort to preserve wild tracts of land.

The purpose of state parks is to preserve wild and scenic tracts of land and to provide for the recreational needs of state residents.

Tillenius sat on numerous committees to preserve tracts of Manitoba wilderness to benefit wildlife.

The park preserves undisturbed tracts of mallee vegetation, and rosewood-belah woodland.

For that reason, the conservancy announced that it would earmark $1 billion over the next five years to preserve large tracts of the American wilderness.

Thus, policies like San Antonio's effort to preserve tracts of land that are home to large, native trees are rendered largely ineffectual.

Their decisions, however, have also helped preserve large tracts of developable land for the public.

The Nawab helped to forestall this by preserving vast tracts of the Gir forest in order to provide the lions with a stable habitat.

Theodore Roosevelt, founder of our national refuges system, once said that "it is entirely in our power as a nation to preserve large tracts of wilderness."

If we want to preserve big tracts of open space like those, we have to buy them.