What are the major sources of global commercial energy?

Answer:
The major sources of global commercial energy are oil, gas and coal.

The three major sources of global commercial energy are, (fossil fuels) petroleum, natural gas, and coal. (Cunningham & Cunningham, 2009, p. 283)

Reference

Cunningham, W.P. and Cunningham, M.A. (2008). Principles of environmental science: Inquiry and applications (5th ed.). New York: McGraw-Hill
First answer by ID1202295736. Last edit by Dah1717. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 1 [recommend question].