It feeds half the world. It Also Emits 2% of Global CO₂. Can We Fix It?

In this episode of Future in Bloom, host Steph talks with Dr. Lea Winter, a chemical and environmental engineering professor at Yale, to explore how we can redesign the basic chemistry of our economy and actually reuse CO2. Lea breaks down why carbon isn’t just a pollutant to get rid of but an essential building block of our everyday lives. Her lab is developing ways to take CO2 from the atmosphere or industrial emissions and convert it into fuels, chemicals, and materials using reactions that could one day replace fossil-fuel-based manufacturing. Lea also explains how synthetic fertilizer enabled the population boom of the 20th century, but at a steep cost: massive fossil fuel dependence, significant CO2 emissions, and widespread nitrogen contamination of groundwater and ecosystems. Her lab is pursuing green ammonia pathways that use only air, water, and renewable electricity. Together, Lea and Steph discuss her work on transforming wastewater into a resource recovery opportunity, converting nitrogen contaminants into ammonia for fertilizer. Lea shares her vision of a truly circular chemical economy, one designed to eliminate waste, increase resilience, and expand access to essential resources for communities around the world.