Push factors may include conflict, drought, famine, or extreme religious activity. Poor economic activity and lack of job opportunities are also strong push factors for migration.
Unemployment. Often, people leave places where they are less likely to get employment (such as rural areas) and go to urban areas where job opportunities are more plentiful. This factor has been the major reasons cities and towns are highly populated. Individuals leave their homes to search for employment in more industrialized areas.
Insecurity. People move away from places that experience terrorism, violence, and high levels of crime. They move in search of peaceful and secure environment.
Scarcity of land. People are forced to migrate in search of more land to cultivate and live in. Individuals in need of undertaking extensive agriculture move to less populated areas.
Political instability. The effects of politics force people to move out of their homes or even countries, in search of a peaceful environment.
Drought and famine. Some communities are nomads in that they move away from their land in periods of severe drought and famine in search of water and food.
Hope this helps:)