Adjective

(en adjective)

Able to be sustained.

Able to be produced or sustained for an indefinite period without damaging the environment, or without depleting a resource; renewable.

* 2008 , Kate L. Harrison, The Green Bride Guide , ISBN 140221345X, page 174 [http://books.google.com/books?id=O5FyqGQmdpUC&pg=PA174&dq=sustainable]:

In addition to the resources listed in the organic and local food sections earlier, a good source of sustainable meat is Heritage Foods USA (heritagefoodsusa.com).

* 2008 August–October, Dawn Brighid, "A Taste of Hope", in Organic Gardening , ISSN 1536-108X, volume 55, number 6, page 73 [http://books.google.com/books?id=S8MDAAAAMBAJ&pg=PA73&dq=%22that+sustainable%22]:

Some critics have asserted that sustainable food is "elitist"; that it's too expensive and not widely available.

* 2010 , , ISBN 9780061718946, page 129 [http://books.google.com/books?id=_-Z6Umuq68EC&pg=PA129&dq=sustainable]:

A city on a hill—or many cities on hills—surrounded by unbroken vistas of beautiful countryside; small, thriving, family-run farms growing organic, seasonal, and sustainable fruits and vegetables specific to the region.

Adjective

(en adjective)

Relating to ecology, the interrelationships of organisms and their environment.

*{{quote-magazine, year=2013, month=May-June, author= Katie L. Burke

, title= In the News , volume=101, issue=3, page=193, magazine=(American Scientist) , passage=Bats host many high-profile viruses that can infect humans, including severe acute respiratory syndrome and Ebola. A recent study explored the ecological variables that may contribute to bats’ propensity to harbor such zoonotic diseases by comparing them with another order of common reservoir hosts: rodents.}}

Not harmful to the environment.