INTRODUCTION Humans are dependent upon natural systems for the necessities of life such as air and water, as well as resources that are essential for modern societies (Odum 1993).
(INTRODUCTION Humans; are; dependent upon natural systems for the necessities of life such as air and water, as well as resources) (resources; are; essential for modern societies (Odum 1993) (INTRODUCTION Humans; are dependent upon; natural systems)
INTRODUCTION Humans resources INTRODUCTION Humans
are are are dependent upon
dependent upon natural systems for the necessities of life such as air and water, as well as resources
essential for modern societies (Odum 1993
natural systems