(3)Environmentally sustainable bonds are one of the main instruments for financing investment related to environmentally sustainable technologies, energy and resource efficiency as well as environmentally sustainable transport infrastructure and research infrastructure. Financial and non-financial undertakings, as well as non-corporate entities such as sovereigns, can issue such bonds. The various existing initiatives for environmentally sustainable bonds do not contain common definitions of environmentally sustainable economic activities. That prevents investors from easily identifying bonds the proceeds of which are aligned with, or contribute to, the environmental objectives laid down in the Paris Agreement.