The Industrial Designers Society of America (IDSA) is the top professional association for industrial designers. (note: AIGA, which is stated in a previous post is for all sections of design; IDSA is strictly for Industrial Design.) Even being a student in college and not a practicing professional ,my professors have urged the students to become familiar with IDSA membership to enhance and further our careers. The link I provided is a PDF of research IDSA members conducted to make their goal of effective sustainable design. They did research on how to understand a product’s life cycle, and how to make the life longer (therefore less impact on the environment). This is a credible source, although, the technical vocabulary makes it aimed towards a specialized audience.