What do CEOs and sustainability officers at major corporations see as their biggest sustainability problems? Which sector is most likely to provide the leadership needed to solve grand environmental challenges? What will it take to truly tackle a complex global issue such as climate change?

Noted business and sustainability journalist Marc Gunther recently sat down with Ensia founding editor Todd Reubold to tackle these questions as well as share thoughts on his decades-long career reporting on the intersection of business and sustainability, life as a journalist working with some of the world’s leading publications, and his latest work measuring the effectiveness of environmental NGOs.

This video was produced as part of the ongoing Ensia Live speaker series. Ensia Live features noted authors, journalists, scientists, business leaders, explorers and other thought leaders working on the forefront of solving today’s — and tomorrow’s — most pressing environmental challenges.