Blue bonds, a form of debt that allows investors to fund water conservation efforts, are on the brink of a major breakthrough, with the market size set to expand significantly. This development could have a significant impact on the sustainable finance sector. What Happened: Blue bonds, which enable investors to finance water conservation projects, are gaining momentum in the sustainable finance sector. Although the current market value is relatively modest at about $5 billion, it is poised for substantial growth, Business Insider reported on Sunday. Matt Lawton, a portfolio manager at T Rowe …