Sustainability is defined as, "The capability of an economic or social system to meet its current needs without impairing the ability of future generations to meet their needs."
-- A Dictionary of Economics
Sustainability spans many fields of study, ranging from environmental and earth sciences, biology, economics and politics, business, and agriculture to name a few. The concept of sustainability can, therefore, be expressed by many different words and word combinations to get relevant results. Here are some sample terms:
Note: Truncation symbols are often used in databases. When you use the * symbol at the end of sustain* for example, results will contain alternative endings such as sustain, sustainable, sustainability. When you use double quotes " ", results will look for the exact phrase.
"local food" or "food market"
"low impact development"
Prius, Volt, or Leaf