A sustainable community would have a circular economy, basically a lot of cycles that turn a material into a product, which is used, disposed, and turned back into that material. This would be a transition from a linear economy. Here's an example of a linear economy: we make plastic from oil, plants, and natural gas. We use them in countless products like plastic cups. Once we dispose the plastic it makes its way into a landfill, where it will take thousands to millions of years to degrade. Ways we can make a sustainable community is to have a circular economy, use perfect substitutes of the products that benefit us but hurt the Earth, and not have a societal focus on what we don't have, but what we already do have.