RACHEL BEGLIN COLUMN: Don't forget the third pillar of sustainability Finding solutions to our ongoing energy and material needs is challenging. I can see why we want to rush ahead and go forward with projects that have been in development for years. But we can’t keep putting them in other people’s backyards. Written By: Rachel Beglin | × The word sustainability has been used so frequently and slapped onto so many programs that sometimes we forget what it means. In college, sustainability was explained to me as a three-legged stool. The three pillars needed to keep the stool in balance are long-term social, environmental and economic feasibility.