Civil engineering is one of the oldest and largest branches of engineering. It focuses on the well-being of the civilian population by designing, constructing, operating and maintaining private and public facilities. You need civil engineers to design buildings (including high rise building and recreational centers), factories, bridges, highways, airports, harbors, bridges, dams, tunnels, sewage treatment plants, railways, water supply systems, solid waste incinerators and other private and public facilities. A world without civil engineers would turn into chaotic and unsafe place. In fact, civil engineering could claim to have saved more lives than any other profession in the world. The field of civil engineering is subdivided into structural, transportation, geotechnical, construction, water resources and environmental engineering.