The Clean Air Act has reduced particulate matter pollution, ground-level ozone, carbon monoxide, nitrogen oxides and sulfur dioxides, ushering in capture technologies that have improved air quality and health. Further improvements, however, may be difficult to achieve. With Dr. Tracey Holloway, from the University of Wisconsin and NASA, and Emily Schilling, a law partner at Holland & Hart.

Fertilizer drives modern agriculture, to feed the world. It turns natural gas, nitrogen from the atmosphere, and mined minerals into plant nutrients, which end up on our plates to nourish our bodies - but with large energy and greenhouse gas footprints. We'll discuss benefits, challenges and potential solutions with Chrystel Monthean from Yara and Dr. Jason Haegele from ICL Group.

Twenty years ago, wind, solar, grid-scale batteries, and the powerlines to connect them were rare. Now they're mainstream. Our two guests have been there since the beginning. We'll hear how they've led alternative energy development and investment companies with great success. With Hunter Armistead, CEO of Pattern Energy, and Michael Harrington, Chief Investment Officer for Actis.