Rallying energy commodity prices are expected to drive up primary energy expenditures globally to a record 13 percent of world gross domestic product (GDP), comparable to the energy cost levels in the 1979-80 energy crisis, research consultancy for energy technologies Thunder Said Energy said in a report on Wednesday. The expected record 13-percent energy expenditure would be three times the average level of 4 percent between 1900 and 2020, and 1.3 times the 2018 levels, the consultancy noted. Since the beginning of the 20th century, primary…