The document is about classifying and defining different types of resources. It discusses:
1) There are three main types of resources: natural resources which come directly from nature, human resources which are people, and human-made resources which are created through human modification of natural substances.
2) Natural resources can be further classified as renewable resources like water and forests that regenerate and non-renewable resources like coal and oil that do not regenerate on a human timescale.
3) Conservation of resources through sustainable use is important to ensure resources last for future generations. Sustainable development balances current resource use with conservation for the future.