books.google.com - As humans have come to dominate the earth, the ideal of studying and teaching ecology in pristine ecosystems has become impossible to achieve. Our planet is now a mosaic of ecosystems ranging from the relatively undisturbed to the completely built, with the majority of people living in urban environments....https://books.google.com/books/about/Urban_Ecosystems.html?id=qcl_cmlQWkEC&utm_source=gb-gplus-shareUrban Ecosystems