I'm writing a paper on the gasoline industry, specifically on how the general environment (i.e. demographics) and task environment (i.e. suppliers, distributors, customers, etc.) affect an organization within the industry (i.e. BP, Shell, Exxon-Mobil, etc). While an organization is part of it, the paper is to focus on the forces that exist within the industry as a whole.
Can anyone provide their input or ideas as to the major forces in this industry and how they are likely to change over the next 3 years or so? Anyone with even moderate knowledge in this area would be helpful.