Rosa Guedes Ph.D., Assistant Professor, Environmental Science.                            

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Planting  Trees in East Falls  (Soils Course )                         Environmental Science Course                              Training Farmers in  EMBRAPA , Brazil .

Photos  © Dr. Robert Potter, & Susan B. Harrison.

''The last word in ignorance is the man who says of an animal or plant: "What good is it?" If the land mechanism as a whole is good, then every part is good, whether we understand it or not. If the biota, in the course of aeons, has built something we like but do not understand, then who but a fool would discard seemingly useless parts? To keep every cog and wheel is the first precaution of intelligent tinkering." 

-- Aldo Leopold, Sand County Almanac .

 

 

                                                                        

 Philadelphia  University . Page created  and maintained by Rosa Guedes.