Global green financing has grown 100 times over the past decade. And yet, it is still surrounded by considerable controversy – why is it so? Bank of France's Jean Boissinot – a leading expert of green finance in the central bank community – explains what green finance can (and cannot) do for environmental sustainability. He also highlights the role and achievements of the Network for Greening the Financial System, a group of central banks and supervisors working together on environmental and climate issues