004100000a2200109000450024501440000065000260014465000360017065000150020604100130022110000220023477300440025610aUncertain future of the tropics:" the developed nations should return some of the resources ripped off the tropics over the past 400 years"14aDesarrollo sostenible14aConservación de biodiversidad14aTrópicos0 aInglés1 aJanzen, Daniel H.1 tNaturalists at Large3314q80-94d1973?