A niche market in debt raised to fund environmental projects may be set for significant growth and could make a bigger contribution to the trillions of dollars needed to stop the world overheating.
The volume of "green bonds" with proceeds earmarked for investments such as a wind farm or a low carbon transport network nearly doubled in 2016. Sales could accelerate further this year, with France set to become the first G7 country to join the development banks and companies that have already issued this form of financing.