Green finance is not just about investing in clean energy or carbon sequestration. The core of the problem is sustainability - how to create financial systems that enable people to thrive over the long term.

A lot of the focus today goes to the E in ESG investing, which represents the environmental factor, and the latter two parts - Social and Governance - are often overlooked.

Today I’d like to explore what the S in ESG stands for. My guest is Timothy Flacke, who is the co-founder and executive director of Commonwealth, a national nonprofit helping the financially vulnerable build security.