1 Introduction Our reliance on fossil fuel Oi-38% is overwhelming We will explore how each fuel was formed. the Coal Gas history of its use and esource development and projections for its use the future Petroleum Hydroelectric Nuclear 0 1op thermal Natural gas Coa Shale oil Tar sand 2004 World Wide Energy Sources1. Introduction 2004 World Wide Energy Sources Our reliance on fossil fuel is overwhelming. We will explore how each fuel was formed, the history of its use and resource development, and projections for its use in the future. Petroleum Natural gas Coal Shale oil Tar sand