Volunteering may have positive benefits for the volunteer as well as for the person or community served. It is also intended to make contacts for employment. Many volunteers are specifically trained in the areas they work, such as medicine or education.
State governments set overall educational standards, often mandate standardized tests public school systems and supervise, usually through state colleges. Private schools are generally free to determine their own curriculum and staffing policies.
In such areas where man has fundamentally transformed landscapes such as urban settings, the natural environment is greatly modified into a simplified human environment. Even acts which seem less extreme, such as building modify the natural environment.