To understand the value of the 1971 PDF, one must look at the era. The first Earth Day was in 1970. The U.S. National Environmental Policy Act (NEPA) was passed in 1969. The world was waking up to smog, dying rivers, and the concept of "pollution."
If you are a student looking for this text, contact your university’s environmental science department librarian. Many institutions have kept the Odum 1971 legacy alive through controlled digital lending. odum 1971 fundamentals of ecology pdf
