This document discusses resources and sustainability. It defines a resource as anything that satisfies human wants or helps achieve societal objectives. Resources are classified in various ways, such as renewable vs. non-renewable and biotic vs. abiotic. Soil is an important resource but is vulnerable to erosion, so conservation methods like afforestation, contour plowing and terracing can help prevent erosion. Sustainability is about meeting present needs without compromising future generations' ability to meet their own needs. We are using resources faster than the planet can replenish them, so sustainable practices are needed.