Hi everyone, I was looking at some data from the Energy Information Association (http://www.eia.doe.gov/emeu/mecs/mecs2006/pdf/Table3_2.pdf\) about the fuel used by different industrial processes. Under the industry of "Petroleum Refining," there is a bit of natural gas and electricity used, but the majority of the energy comes from an 'Other' section listed on the far right of the table. This is listed as constituting about 70% of the energy used by petroleum refineries. The footnote for the 'other' category says What does 'other' refer to in this case? Is it energy derived from cracking of the oil? The categories that are not 'other' are electricity, natural gas, residual fuel oil, distillate fuel oil, LPG, NGL, coal, and coke. Thanks in advance for any help. Note: I am not sure if this is the proper section to post this question.