This document provides an introduction to the topic of sustainability. It discusses key concepts like resources, population growth, sustainable development, and interdependence. Resources are defined as anything taken from the environment to make goods and products for human needs and wants. However, using resources leads to waste. Sustainable development means meeting current needs without compromising the ability of future generations to meet their needs. It involves considering consumption, waste, and responsible use of Earth's finite resources. The document stresses thinking globally about how our actions impact others and acting locally through sustainable practices in our own communities.