The sociology of food and agriculture is one focus of rural sociology, and much of the field is dedicated to the economics of farm production. Other areas of study include rural migration and other demographic patterns, environmental sociology, amenity-led development, public-lands policies, so-called "boomtown" development, social disruption, the sociology of natural resources (including forests, mining, fishing and other areas), rural cultures and identities, rural health-care, and educational policies. Many rural sociologists work in the areas of development studies, community studies, community development, and environmental studies. Much of the research involves developing countries or the Third World.