Sustainable development aims to create good living conditions for all people without compromising future generations. It can be divided into environmental, social, and economic categories. Environmentally, sustainable practices include turning off lights, recycling, and reducing consumption. Socially, sustainability means ensuring survival and welfare for current and future generations through efforts like donating to charity. Economically, sustainability requires safety nets and reasonable prices stabilized by inflation-free currencies. The three categories are interdependent, so actions like buying fair trade help the environment, social conditions, and economies.