Environmental sciences students focus their studies on environmental related issues using social scientific, scientific, and humanistic approaches. While studying environmental science, students will learn basic principles of related subjects such as ecology, law, policy, economics, pollution, and natural resources. Courses in biology, chemistry, physics, geosciences, statistics, and math modeling are also typical areas of study. Abilities to utilize the Internet and other computer resources, as well as the ability to collect, organize, and analyze data are also necessary skills. Students of environmental science should have an interest in improving the balance of natural resources between mankind and the environment. Graduate school is not required but employers increasingly prefer master's degrees. A Ph.D. is required for high-level research or college teaching positions.