The market and regions are expanding, but the green bond market has issues. Among the big issues concerning markets and regions is the lack of standardization, and there is no worldwide harmonization of a European Union Green Bond Standard. Sometimes, it gets pretty tricky for investors to obtain the right, clear assessment of just how completely environmental a project is going to be.
There's transparency and how the proceeds are efficiently used. The investors must be ensured that the money raised through the green bond is used to acquire green projects. This must be improved through mechanisms that offer third-party verification and reporting so the market is assured.