A bond whose proceeds are used only to finance or refinance a combination of both environmental and social projects is called:

A Sustainability Bond is a type of bond where the proceeds are used to finance or refinance a combination of both green (environmental) and social projects. Green Bonds finance only environmental projects (renewable energy, clean transportation, etc.). Social Bonds finance only social projects (affordable housing, education, healthcare for disadvantaged groups, etc.). Sustainability Bonds combine both objectives. Sovereign Bonds are debt instruments issued by national governments and are unrelated to this categorization. The International Capital Market Association (ICMA) has issued Sustainability Bond Guidelines that align with both Green Bond Principles and Social Bond Principles.