11.   Some species manage to live on land in humid tropical forests, undulating on mucus that they secrete from their undersides.

12.   The birds inhabit tropical forests, savannah, and arid semi-desert conditions.

13.   They suggest that tropical forests be translated into zonal parks or exchanged for poor-world debts.

14.   This maintains the important illusion that one has stepped into a warm stream in a lush tropical forest.

15.   What all these tropical forests have in common, however, is their astonishing biological diversity.

16.   The conservation of tropical forests is of crucial importance.

17.   Diffuse bands hunting deep in the forest interior eventually came to be seen as the typical tropical forest adaptation.

18.   These soils are usually filled with fragments of busted ceramics and are now being studied for clues to the rise of tropical forest civilizations in the Amazon Basin.

19.   Among its proposals were the payment of fees by industrialized nations to countries with tropical forests, for carbon absorption services.