A battle has erupted over a plan to remove trees to re-establish the sand dunes that once blanketed a park in San Francisco.

The result is a generation of trees that barely resemble the native forests that once blanketed the country.

Citrus trees once blanketed these low mounds, but recurring freezes have moved the industry farther south.

Northland's reserves shelter the most spectacular remnants of the ancient kauri forests that once blanketed the top of the country.

There are scrapbook items like the "Missing" posters that once blanketed Lower Manhattan.

He is the only person in the building, for instance, who remembers the shantytown Hooverville that once blanketed Riverside Park at 72nd Street.

Close to 200,000 acres of tidal marsh and wetland habitat once blanketed the waterways, part of the Pacific Flyway.

Less than 3 percent of the longleaf pine forests that once blanketed more than 90 million acres of the Southeast still stand.

This little butterfly, the Miami blue, once blanketed much of Florida, but it has been all but eradicated by development, hurricanes, mosquito spraying and more.

The vast tire plants and aircraft factories that once blanketed the city with soot are going or gone.