Sustainability means different things to differnt people. It is often confused with recycling, and sometimes it is used interchangably with the term "reducing your carbon footprint."
In reality sustainability covers a variety of topics such as energy, water conservation, endangered species, going green, and the like. A simple definition is, "To meet the needs of today's people, without compromising the needs of future generations."
The following links will provide information on the many categories that contribute to sustainability: