SAVING our planet from the worst effects of climate change won’t be cheap. A new report from the United Nations says that the world will need to mobilize $90 trillion in public and private capital over the next 15 years.

As a point of comparison, global gross domestic product in 2015 was $73 trillion. But there is no question that the world needs to ramp up its transition to a low-carbon, environmentally sustainable and resilient economy, and to do so rapidly. The question is, how do we pay for it, given the limited availability of government funding, particularly in developing countries?

The answer: private financing. The good news is that there is a global abundance of private capital. To unlock these riches, governments must create conditions that encourage private investment in clean technologies and sustainable development. With smart, well-designed and coordinated policies, financing models and instruments like bonds and incentive programs, countries have the potential to solve some of the planet’s most pressing environmental challenges while still maintaining economic growth.

Read the full story. (New York Times op-ed)