Attempts to drain the wetlands have destroyed most of the original swamps and eliminated much of the habitat for the native plants and animals that once characterized the region.
(Attempts to drain the wetlands; have destroyed; most of the original swamps) (Attempts to drain the wetlands; eliminated; much of the habitat for the native plants and animals) (the native plants and animals; characterized; the region; T:once)
Attempts to drain the wetlands Attempts to drain the wetlands the native plants and animals
have destroyed eliminated characterized
most of the original swamps
much of the habitat for the native plants and animals
the region T:once