Describe in detail the concept of sustainability including the three main themes or pillars of sustainability—ecology, society, and economy.Assignment 3: Course Project—Sustainability at Top Shelf ShoesIn this course, you will work independently to analyze sustainability issues for a hypothetical organization. The assignments follow one another so that you can apply the methods and skills you learn in each module to develop your Course Project. Each week you will be asked to prepare a document that addresses the specified topics. In this assignment, you will begin your analysis.Outlined below is the scenario for the organization that is the focus of your Course Project—Top Shelf Shoes.Course Project Scenario: Top Shelf ShoesTop Shelf was found in 1990 by Tie Woodward. Within five years, Top Shelf had established a solid presence in the global shoe business with production facilities in Asia and sales throughout the world. By 2000, Top Shelf had a share of 45 percent of the global market in shoe sales. In 2001, Top Shelf made the Fortune 500 list of privately held companies and Tie was awarded the coveted International Business Award. However, Tie claimed the real success of his firm could be seen in the stylish Top Shelf shoes being worn by everyone from villagers in Africa to rock stars in Hollywood.In 2003, a major competitor of Top Shelf began a green marketing campaign to highlight its efforts to reduce its environmental footprint with its new “Green Shoe.” A simultaneous, growing concern for environmental issues helped spur the sales of Top Shelf’s competitor—it gained market share. As the competitor’s sales increased, news stories began to question the implications of Top Shelf’s business practices, especially as they related to low cost labor and environmental concerns. Within a fiscal quarter, Top Shelf sales were down by 10 percent. Tie responded by exclaiming on the Nightly Business Report that everyone had to wear shoes and Top Shelf made the best looking and most affordable foot fixtures on the planet. Sales fell another 5 percent the following quarter. Tie’s management team attributed this to the competition’s green efforts and the bad publicity received by Top Shelf.