Sustainability is a vastly diverse and interdisciplinary area of study. In order to successfully research a topic in relation to sustainability, we suggest that you not only search for your topics in sustainability journals, databases, and resources, but also research your topics in the specific field of study on which you would like to focus (e.g., search for sustainable building design in the sustainability database GreenFile as well as the Avery Index to Architectural Periodicals).
Sustainable development is our ability to "meet the needs of the present without compromising the ability of future generations to meet their own needs" --- 1987 Our Common Future (Brundtland Report) World Commission on Environment and Development
"to create and maintain conditions under which man and nature can exist in productive harmony, and fulfill the social, economic, and other requirements of present and future generations of Americans" --- 1969 National Environmental Protection Act
"sustainable development is economnic growth that will benefit present and future generations without detrimentally affecting the resources or biological systems of the planet" --- President's Council on Sustainable Development