Answer:
Environmental scientists define sustainability as the ability of a system or process to maintain its functions and productivity over time. This means that a sustainable system or process can continue to operate and produce the desired outcomes without depleting or degrading its resources. Sustainability is often measured in terms of the three pillars of sustainability: social, economic, and environmental. These pillars represent the different dimensions of sustainability, and all must be balanced in order for a system or process to be considered sustainable. Sustainability is an important concept in environmental science, as it helps to ensure that human activities do not harm the environment and that natural resources are used in a way that allows them to be replenished.