This document discusses natural resources and how humans use and impact the environment. It defines natural resources and categorizes them as recyclable, renewable, and nonrenewable. Fossil fuels are described as nonrenewable resources formed from ancient plants and animals. Human uses of land and resources are organized into three levels: direct use (hunting, fishing), basic manufacturing, and service industries. Developed nations rely more on industry, goods, and services while developing nations focus on subsistence farming and living off the land. The document notes that human activities like deforestation and global warming negatively impact the environment.