Almost three-quarters of the pandemic-driven jobs losses in the U.S. petroleum and chemical sectors may not come back before the end of next year, according to Deloitte LLP. The collapse in oil demand and prices spurred the fastest rate of oil- and chemical-industry layoffs in history, with about 107,000 jobs eliminated between March and August, Deloitte said in a study scheduled to be released Monday. The number is probably even higher when furloughs and other headcount measures are taken into account, according to Duane Dickson, vice chairman and U.S. oil, gas and chemicals leader for Deloitte. Oil explorers, gas drillers, frackers, refiners and equipment makers have shrunk their workforces to cope with the plunge in demand for the products […]