The sector was being encouraged to move away from carbon intensive investment.
The UN said finance for climate projects was flowing at a greater pace, with vibrant markets now for renewable energy, electric vehicles, green buildings and climate-smart agriculture.
The World Bank said funding needed to flow so people everywhere could benefit from low-carbon and climate resilient investments.
It hopes the UN can attract public, private, and philanthropic investors.
The European Commission said hundreds of billions of euros in investment were needed to move to a low carbon economy and meet the Paris Agreement targets.
It is preparing an action plan on sustainable and green finance for early next year.