The document discusses concepts related to sustainable development and environmental ethics. It defines sustainable development as development that meets present needs without compromising future generations' ability to meet their own needs. It also outlines three important principles of sustainability: environmental integrity, economic efficiency, and equity. The document then defines environmental ethics as the discipline studying humanity's moral relationship to the environment. It presents four views on attributing moral consideration: anthropocentrism, pathocentrism, biocentrism, and ecocentrism.