This document provides an introduction to environmental planning, including: 1. It defines the environment and environmental science, noting that the environment involves what is surrounded, what surrounds it, and where. 2. It discusses the history of the environmental movement from the 19th century works of Thoreau and Muir to the modern era, including key events like the publication of Silent Spring and international agreements like the Kyoto Protocol. 3. It addresses the growth of cities and urbanization and their environmental impacts like sprawl, as well as issues like population growth and the need for sustainable development that considers both human and environmental needs.