NEW ORLEANS, Louisiana, Sept. 24 [Category: BizEnergy] -- Entergy posted the following news release: * * * Entergy Mississippi launches largest, most comprehensive grid upgrade in company history: Superpower Mississippi * JACKSON, Miss. - Entergy Mississippi is meeting customers' power needs to provide more and better power by making a five-year investment in reliability, while keeping rates far below the national average. And the large industrial investments that companies like Amazon have  more PR