Walmart is backing solar projects in nearly two dozen communities and has three long-term purchase agreements that will generate almost 1 gigawatt of zero-carbon energy, as part of the retailer’s goal to generate 10 gigawatts of clean energy worldwide by the decade’s end. The new installations will be in Arkansas, Louisiana, Mississippi, California, Colorado, Illinois, Maryland and Delaware, with construction on some projects expected to begin this year. GreenBiz